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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

(Mark One)

For the fiscal year ended December 31, 2013

Or

Commission file number 001-34942

Inphi Corporation

(Exact Name of Registrant as Specified in Its Charter)

2953 Bunker Hill Lane, Suite 300,

Santa Clara, California 95054

(Address of Principal Executive Offices) (Zip Code)

Registrant’s telephone number, including area code: (408) 217-7300

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  ¨    No  þ

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ¨    No  þ

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  þ    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  þ    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  þ

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Indicate by check mark whether the registrant is a shell company (as defined in Exchange Act Rule 12b-2).    Yes  ¨    No  þ

As of June 30, 2013, the aggregate market value of the Registrant’s common stock held by non-affiliates of the Registrant was approximately $307 million, based on the closing price of the common stock as reported on the New York Stock Exchange for that date.

The total number of shares outstanding of the Registrant’s common stock, $0.001 par value per share, as of February 27, 2014 was 30,812,412.

DOCUMENTS INCORPORATED BY REFERENCE

Part III incorporates by reference certain information from the registrant’s definitive proxy statement for the 2014 Annual Meeting of Stockholders to be filed no later than 120 days after the conclusion of the registrant’s fiscal year ended December 31, 2013.

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INPHI CORPORATION

ANNUAL REPORT ON FORM 10-K

FOR THE FISCAL YEAR ENDED DECEMBER 31, 2013

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PART I

This report contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. When used in this report, the terms “may,” “might,” “will,” “objective,” “intend,” “should,” “could,” “can,” “would,” “expect,” “believe,” “estimate,” “predict,” “potential,” “plan,” or the negative of these terms, and similar expressions intended to identify forward-looking statements. These statements are statements that relate to future periods and include statements regarding our anticipated trends and challenges in our business and the markets in which we operate, including the market for 40G and 100G high-speed analog semiconductor solutions, our plans for future products, expansion of our product offerings and enhancements of existing products, our expectations regarding our expenses and revenue, sources of revenue, our tax benefits, the benefits of our products and services, timing of the development of our products, our anticipated cash needs and our estimates regarding our capital requirements and our needs for additional financing, our anticipated growth and growth strategies, our ability to retain and attract customers, particularly in light of our dependence on a limited number of customers for a substantial portion of our revenue, our expectations regarding competition, interest rate sensitivity, adequacy of our disclosure controls, our legal proceedings and warranty claims. These forward-looking statements involved known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by these or any other forward-looking statements. These risks and uncertainties include, but are not limited to, those risks discussed below, as well as factors affecting our results of operations, our ability to manage our growth, our ability to sustain or increase profitability, demand for our solutions, the effect of declines in average selling prices for our products, our ability to compete, our ability to rapidly develop new technology and introduce new products, our ability to safeguard our intellectual property, trends in the semiconductor industry and fluctuations in general economic conditions, and the risks set forth throughout this Report, including the risks set forth under Part I, “Item 1A, Risk Factors”. Readers are cautioned not to place undue reliance on these forward-looking statements, which are based on current expectations and reflect management’s opinions only as of the date hereof. These forward-looking statements speak only as of the date of this Report. We expressly disclaim any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in our expectations with regard thereto or any changes in events, conditions or circumstances on which any such statement is based.

All references to “Inphi,” “we,” “us” or “our” mean Inphi Corporation.

Inphi^®, iMB™ and the Inphi logo are trademarks or service marks owned by Inphi. All other trademarks, service marks and trade names appearing in this report are the property of their respective owners.

Overview

Our Company

We are a fabless provider of high-speed analog and mixed signal semiconductor solutions for the communications, datacenter and computing markets. We often refer to our business as covering various data transport segments from “fiber to memory”. Our analog and mixed signal semiconductor solutions provide high signal integrity at leading-edge data speeds while reducing system power consumption. Our semiconductor solutions are designed to address bandwidth bottlenecks in networks, maximize throughput and minimize latency in computing environments and enable the rollout of next generation communications, datacenter and computing infrastructures. Our solutions provide a vital high-speed interface between analog signals and digital information in high-performance systems such as telecommunications transport systems, enterprise networking equipment, datacenters and enterprise servers, storage platforms, test and measurement equipment and military systems. We provide 40G and 100G high-speed analog semiconductor solutions for the communications market and high-speed memory interface solutions for the computing market.

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We leverage our proprietary high-speed analog and mixed signal processing expertise and our deep understanding of system architectures to address data bottlenecks in current and emerging communications, enterprise network, computing and storage architectures. We develop these solutions as a result of our competitive strengths, including our system-level simulation capabilities, analog design expertise, strong relationships with industry leaders, extensive broad process technology experience and high-speed package modeling and design expertise. We use our core technology and strength in high-speed analog design to enable our customers to deploy next generation communications and computing systems that operate with high performance at high speed. We believe we are at the forefront of developing semiconductor solutions that deliver 100G speeds throughout the network infrastructure, including core, metro and the datacenter. Furthermore, our analog signal processing expertise enables us to improve throughput in computing systems. For example, some of our computing products enable up to four times the memory capacity on server platforms while using the current generation of memory devices.

We have ongoing, informal collaborative discussions with industry and technology leaders such as Advanced Micro Devices, Inc. (AMD), Alcatel-Lucent, ARM Ltd., Ciena Corporation, Cisco Systems, Inc., Huawei Technologies Co., Ltd., Juniper Networks Inc., Intel Corporation, Micron Technology, Inc., Samsung and SK Hynix Inc. to design architectures and products that solve bandwidth bottlenecks in existing and next generation communications and computing systems. Although, we generally do not have any formal collaboration agreements with these entities, we often engage in informal discussions with these entities with respect to anticipated technological challenges, next generation customer requirements and industry conventions and standards. We help define industry conventions and standards within the markets we target by collaborating with technology leaders, original equipment manufacturers or OEMs, systems manufacturers and standards bodies. Our products are designed into systems sold by OEMs, including Alcatel-Lucent, Ciena, Cisco, Dell Inc., EMC Corporation, Hewlett-Packard Company, Huawei, International Business Machines Corporation (IBM), Juniper and Oracle Corporation. We believe we are one of a limited number of suppliers to these OEMs, and in some cases we may be the sole supplier for certain applications. We sell both directly to these OEMs and to other intermediary systems or module manufacturers that, in turn, sell to these OEMs.

Our Business

Our semiconductor solutions leverage our deep understanding of high-speed analog and mixed signal processing and our system architecture knowledge to address data bottlenecks in current and emerging network and datacenter architectures. We design and develop our products for the communications and computing markets, which typically have two to three year design cycles, and product life cycles of five or more years. We believe our leadership position in developing high-speed analog semiconductors is a result of the following core strengths:

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We believe that our system-level simulation capabilities, our analog design and broad process technology design capabilities as well as our strengths in packaging enable us to differentiate ourselves by delivering advanced high-speed analog signal processing solutions. For example, we believe we are the first vendor who has successfully commercialized 100G Ethernet PHYs and CDRs in standard CMOS process. Within the server market, we have applied our analog signal processing expertise to develop our isolation memory buffer, or iMB^TM technology, which is designed to expand the memory capacity in existing server and computing platforms. Adoption of the iMB^TM allows up to four times the memory capacity to be installed in a server platform, while using the current generation of memory devices.

We believe the key benefits that our solutions provide to our customers are as follows:

Products

Our products address bandwidth bottlenecks throughout the network communications and computing infrastructure markets – from “fiber to memory”, as depicted in the illustration below. For instance, our products find application in devices such as dense wavelength division multiplexers that enable core and aggregation networks as well as less complex optical interface links within data center communication infrastructures. In addition, our high-speed memory interface products can be found in servers where they allow CPUs to better utilize available memory resources.

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As of December 31, 2013, we have a wide range product portfolio, including products that have commercially shipped, products for which we have shipped engineering samples and products under development, that perform a wide range of functions such as amplifying, encoding, multiplexing, demultiplexing, retiming and buffering data and clock signals at speeds up to 100 Gbps. These products are key enablers for servers, routers, switches, storage and other equipment that process, store and transport data traffic. We introduced 20 and 15 new products in 2013 and 2012, respectively. We design and develop our products for the communications and computing markets, which typically have two to three year design cycles, and product life cycles as long as five years or more.

In 2010, we began to ship in production volume a “low voltage” version of our integrated PLL and register buffer, which is shipping in the form of product number INSSTE32882LV-GS02, or the GS02 product. Sales of the GS02 product comprised 38% and 32% of our total revenue in 2011 and 2010, respectively. In 2011, we began to ship in production volume a new “ultra-low voltage” version of our integrated PLL and register buffer, which is shipping in the form of product number INSSTE32882UV-GS02, or the GS02UV product. Sales of the GS02UV product comprised 39%, 45% and 13% of our total revenue in 2013, 2012 and 2011, respectively. In 2010, we introduced and began to ship in commercial volume a dual, differential linear transimpedance amplifier which we identify as product number 2850TA-SO1D. Sales of 2850TA-SO1D product comprised 10% and 14% of our total revenue in 2013 and 2012, respectively. There were no other products that generated more than 10% of our total revenue in 2013, 2012 or 2011.

Customers

We sell our products directly to OEMs and indirectly to OEMs through module manufacturers, original design manufacturers or ODMs and sub-systems providers. We work closely with technology leaders, including microprocessor, memory vendors, communications equipment and optical module companies, to design architectures and products that help solve bandwidth bottlenecks in and between systems. These technology leaders often design our products into reference designs, which they provide to their customers and suppliers. For example, in the server market we work closely with major CPU manufacturers to address the bottleneck between the CPU and the increasing amount of memory attached to it. These CPU manufacturers then provide their server CPU customers and memory module partners with a validation report, including validation of our memory interface products. These server OEMs and memory module companies then design our memory interface products into their production systems. Ultimately, our sales into these servers are to memory module companies, including Micron, Samsung, SK Hynix and others. In the networking market, we work closely with OEMs to

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deliver high performance communication links. These OEMs design our product into their systems and then require their ODM and electronics manufacturing services suppliers to purchase and use that specific product from us. We also work directly with optical module manufacturers to design our products into their modules, which they sell to OEMs.

We work closely with our customers throughout design cycles that often last two to three years and we are able to develop long-term relationships with them as our technology becomes embedded in their products. As a result, we believe we are well-positioned to not only be designed into their current systems, but also to continually develop next generation high-speed analog semiconductor solutions for their future products. During the year ended December 31, 2013, we sold our products to more than 160 customers.

Sales to customers in Asia accounted for 71%, 65% and 69% of our total revenue in 2013, 2012 and 2011, respectively. Because many of our customers or their OEM manufacturers are located in Asia, we anticipate that a majority of our future revenue will continue to come from sales to that region. Although a large percentage of our sales are made to customers in Asia, we believe that a significant number of the systems designed by these customers and incorporating our semiconductor products are then sold to end users outside Asia.

We currently rely, and expect to continue to rely, on a limited number of customers for a significant portion of our revenue. In the year ended December 31, 2013, sales to Samsung, including its subcontractors and SK Hynix, including its subcontractor accounted for 20% and 16% of our total revenue, respectively, and our 10 largest customers collectively accounted for 70% of our total revenue. In addition, sales directly and through distributors to Micron accounted for 11% of our total revenue in the year ended December 31, 2013. In the year ended December 31, 2012, sales to Samsung, including it subcontractors and SK Hynix accounted for 23% and 15% of our total revenue, respectively, and our 10 largest customers collectively accounted for 75% of our total revenue. In addition, sales directly and through distributors to Micron accounted for 14% of our total revenue in the year ended December 31, 2012. No other single customer directly or indirectly accounted for more than 10% of our total revenue in 2013 or 2012.

Sales and Marketing

Our design cycle from initial engagement to volume shipment is typically two to three years, with product life cycles in the markets we serve ranging from two to 10 years or more. For many of our products, early engagement with our customers’ technical staff is necessary for success. To ensure an adequate level of early engagement, our application and development engineers work closely with our customers to identify and propose solutions to their systems challenges.

In addition to our direct customers, we work closely with technology leaders such as Intel, ARM and AMD for the computing and storage markets and Alcatel-Lucent, Ciena, Cisco, Huawei and Juniper for the networking and communications market to anticipate and solve next generation challenges facing our customers. As part of the sales and product development process, we often design our products in close collaboration with these industry leaders and help define their architecture. We also participate actively in setting industry standards with organizations such as IEEE, JEDEC and OIF to have a voice in the definition of future market trends.

We sell our products worldwide through multiple channels, including our direct sales force and a network of sales representatives and distributors. For the year ended December 31, 2013, 84% of our revenue was generated by our direct sales team and third-party sales representatives. We operate direct sales offices in Japan, Korea, Singapore, and the United States and employ sales personnel that cover our direct customers and manage our channel partners. We utilize five sales representatives and/or distributors in Asia, a distributor in Europe, a distributor in Israel, a distributor in Japan and six sales representatives and one distributor in North America. Our channel network includes more than 100 sales professionals to support our products and customers, including seven in Japan, 31 in Asia (other than Japan), 34 in North America and 16 in Europe, the Middle East and Africa, or EMEA. All of these sales professionals are sales agents and are employed by our distributors and sales representatives except for 22 sales agents who are our direct employees, including two in Japan, eight in Asia,

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nine in North America and three in EMEA. We believe these distributors and sales representatives have the requisite technical experience in our target markets and are able to leverage existing relationships and understanding of our customers’ products to effectively sell our products. Given the breadth of our target markets, customers and products, we provide our direct and indirect sales teams with regular training and share product information with our customers and sales team using web-based tools.

Manufacturing

We operate a fabless business model and use third-party foundries and assembly and test manufacturing contractors to manufacture, assemble and test our semiconductor products. We also inspect and test parts in our Westlake Village, California, facility. This outsourced manufacturing approach allows us to focus our resources on the design, sale and marketing of our products. In addition, we believe outsourcing many of our manufacturing and assembly activities provides us the flexibility needed to respond to new market opportunities, simplifies our operations and significantly reduces our capital requirements.

We subject our third-party manufacturing contractors to qualification requirements in order to meet the high quality and reliability standards required of our products. We carefully qualify each of our partners and processes before applying the technology to our products. Our engineers work closely with our foundries and other contractors to increase yield, lower manufacturing costs and improve product quality.

We are committed to maintaining the highest level of quality in our products. Our objective is that our products meet all of our customer requirements, are delivered on-time and function reliably throughout their useful lives. As part of our total quality assurance program, our quality management system has been certified to ISO 9001:2008 standards. Our manufacturing partners are also ISO 9001 certified.

Research and Development

We focus our research and development efforts on developing products that address bandwidth bottlenecks in networks and minimize latency in computing environments. We believe that our continued success depends on our ability to both introduce improved versions of our existing products and to develop new products for the markets that we serve. We devote a portion of our resources to expanding our core technology including efforts in system-level simulation, high-speed analog design, supporting a broad range of process technologies and high-speed package modeling and design.

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We develop models that are used as an input to a combination of proprietary and commercially available simulation tools. We use these tools to predict overall system performance based on the performance of our product. After our product is manufactured, we perform system measurements and refine our model set to improve the model’s accuracy and predictive ability. As a result, our models and simulation tools have improved over time and we have been able to very accurately predict overall system performance prior to fabricating a part.

We have assembled a core team of experienced engineers and systems designers in three design centers located in the United States, Singapore and United Kingdom. Our technical team typically has, on average, more than 21 years of industry experience with more than 65% having advanced degrees and more than 22% having Ph.Ds. These engineers and designers are involved in advancing our core technologies, as well as applying these core technologies to our product development activities across a number of areas including telecommunications transport systems, enterprise networking equipment, datacenters and enterprise servers, storage platforms, test and measurement and military systems. In 2013, 2012 and 2011, our research and development expenses were $50.5 million, $40.1 million and $28.6 million, respectively.

Competition

The global semiconductor market in general, and the communications and computing markets in particular, are highly competitive. We expect competition to increase and intensify as more and larger semiconductor companies enter our markets. Increased competition could result in price pressure, reduced profitability and loss of market share, any of which could materially and adversely affect our business, revenue and operating results.

Currently, our competitors range from large, international companies offering a wide range of semiconductor products to smaller companies specializing in narrow markets. Our primary competitors include Broadcom Corporation, Hittite Microwave Corporation, Integrated Device Technology, Inc., or IDT, M/A-COM Technology Solutions Inc., Semtech Corp., Triquint Semiconductor and Texas Instruments Incorporated, as well as other smaller analog signal processing companies. We expect competition in our target markets to increase in the future as existing competitors improve or expand their product offerings.

Our ability to compete successfully depends on elements both within and outside of our control, including industry and general economic trends. During past periods of downturns in our industry, competition in the markets in which we operate intensified as our customers reduced their purchase orders. Many of our competitors are significantly larger, have greater financial, technical, marketing, distribution, customer support and other resources, are more established than we are, and have significantly better brand recognition and broader product offerings with which to withstand similar adverse economic or market conditions in the future. These developments may materially and adversely affect our current and future target markets and our ability to compete successfully in those markets.

We compete or plan to compete in different target markets to various degrees on the basis of a number of principal competitive factors, including:

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We believe we compete favorably with respect to each of these factors. We maintain our competitive position through our ability to successfully design, develop and market complex high-speed analog solutions for the customers that we serve.

Intellectual Property

We rely on a combination of intellectual property rights, including patents, trade secrets, copyrights and trademarks, and contractual protections, to protect our core technology and intellectual property. As of December 31, 2013, we had 38 issued and allowed patents in the United States and other patent applications pending in the United States. The 38 issued and allowed patents in the United States expire in the years beginning in 2021 through 2029. Many of our issued patents and pending patent applications relate to high-speed circuit and package designs.

We may not receive competitive advantages from any rights granted under our patents, and our patent applications may not result in the issuance of any patents. In addition, any future patent may be opposed, contested, circumvented, designed around by a third party or found to be unenforceable or invalidated. Others may develop technologies that are similar or superior to our proprietary technologies, duplicate our proprietary technologies or design around patents owned or licensed by us.

In addition to our own intellectual property, we also use third-party licensors for certain technologies embedded in our semiconductor solutions. These are typically non-exclusive contracts provided under paid-up licenses. These licenses are generally perpetual or automatically renewed for so long as we continue to pay any maintenance fees that may be due. To date, maintenance fees have not constituted a significant portion of our capital expenditures. We have entered into a number of licensing arrangements pursuant to which we license third-party technologies. We do not believe our business is dependent to any significant degree on any individual third-party license.

We generally control access to and use of our confidential information through the use of internal and external controls, including contractual protections with employees, contractors and customers. We rely in part on United States and international copyright laws to protect our mask work. All employees and consultants are required to execute confidentiality agreements in connection with their employment and consulting relationships with us. We also require them to agree to disclose and assign to us all inventions conceived or made in connection with the employment or consulting relationship.

Despite our efforts to protect our intellectual property, unauthorized parties may still copy or otherwise obtain and use our software, technology or other information that we regard as proprietary intellectual property. In addition, we intend to expand our international operations, and effective patent, copyright, trademark and trade secret protection may not be available or may be limited in foreign countries.

The semiconductor industry is characterized by vigorous protection and pursuit of intellectual property rights and positions, which has resulted in protracted and expensive litigation for many companies. We have in the past received and, particularly as a public company, we expect that in the future we may receive, communications from various industry participants alleging our infringement of their patents, trade secrets or other intellectual property rights. Any lawsuits could subject us to significant liability for damages, invalidate our proprietary rights and harm our business and our ability to compete. Any litigation, regardless of success or merit, could cause us to incur substantial expenses, reduce our sales and divert the efforts of our technical and management personnel. In the event we receive an adverse result in any litigation, we could be required to pay substantial damages, seek licenses from third parties, which may not be available on reasonable terms or at all, cease sale of products, expend significant resources to develop alternative technology or discontinue the use of processes requiring the relevant technology.

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Employees

At December 31, 2013, we employed 229 full-time equivalent employees, including 138 in research, product development and engineering, 33 in sales and marketing, 21 in general and administrative management and 37 in manufacturing engineering and operations. We consider relations with our employees to be good and have never experienced a work stoppage. None of our employees are either represented by a labor union or subject to a collective bargaining agreement.

Other

We were incorporated in Delaware in November 2000 as TCom Communications, Inc. and changed our name to Inphi Corporation in February 2001. Our principal executive offices are located at 2953 Bunker Hill Lane, Suite 300, Santa Clara, California 95054. Our telephone number at that location is (408) 217-7300. Our website address is www.inphi.com. Information on our website is not part of this report and should not be relied upon in determining whether to make an investment decision. The inclusion of our website address in this report does not include or incorporate by reference into this report any information on our website.

We electronically file our annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, or the Exchange Act, with the SEC. The public may read or copy any materials we file with the SEC at the SEC’s Public Reference Room at 100 F Street, NE, Washington, DC 20549. The public may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. The SEC maintains an Internet site that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC. The address of that site is http://www.sec.gov. You may obtain a free copy of our annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K and amendments to those reports with the SEC on our website.

Risks Related to Our Business

Our revenue and operating results can fluctuate from period to period, which could cause our share price to fluctuate.

Our revenue and operating results have fluctuated in the past and may fluctuate from period to period in the future due to a variety of factors, many of which are beyond our control. Factors relating to our business that may contribute to these fluctuations include the following factors, as well as other factors described elsewhere in this report:

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As a result of these and other factors, the results of any prior quarterly or annual periods should not be relied upon as indications of our future revenue or operating performance. Fluctuations in our revenue and operating results could cause our share price to decline.

We have an accumulated deficit and have incurred net losses in the past. We may incur net losses in the future.

As of December 31, 2013, we had an accumulated deficit of $66.6 million. We have incurred net losses in each year through 2008. We also generated net loss of $13.2 million and $20.7 million for the years ended December 31, 2013 and 2012, respectively. We generated net income of $1.9 million for the year ended December 31, 2011. We may continue to incur net losses in the future.

We depend on a limited number of customers for a substantial portion of our revenue, and the loss of, or a significant reduction in orders from, one or more of our major customers could negatively impact our revenue and operating results. In addition, if we offer more favorable prices to attract or retain customers, our average selling prices and gross margins would decline.

For the year ended December 31, 2013, sales to Samsung, including its subcontractors and SK Hynix, including its subcontractor accounted for 20% and 16% of our total revenue, respectively, and our 10 largest customers collectively accounted for 70% of our total revenue. In addition, sales directly and through distributors to Micron accounted for 11% of our total revenue in the year ended December 31, 2013. For the year ended December 31, 2012, Samsung, including its subcontractors and SK Hynix accounted for 23% and 15% of our total revenue, respectively, and our 10 largest customers collectively accounted for 75% of our total revenue. In addition, sales directly and through distributors to Micron accounted for 14% of our total revenue in the year ended December 31, 2012. Some of our customers, including Samsung, SK Hynix and Micron, use our products primarily in high-speed memory devices. We believe our operating results for the foreseeable future will continue to depend on sales to a relatively small number of customers. In the future, these customers may decide not to purchase our products at all, may purchase fewer products than they did in the past or may alter their purchasing patterns.

In addition, our relationships with some customers may deter other potential customers who compete with these customers from buying our products. To attract new customers or retain existing customers, we may offer these customers favorable prices on our products. In that event, our average selling prices and gross margins would decline. The loss of a key customer, a reduction in sales to any key customer or our inability to attract new significant customers could negatively impact our revenue and materially and adversely affect our results of operations.

We do not have long-term purchase commitments from our customers and if our customers cancel or change their purchase commitments, our revenue and operating results could suffer.

Substantially all of our sales to date, including sales to Samsung, SK Hynix and Micron, have been made on a purchase order basis. We do not have any long-term commitments with any of our customers. As a result, our customers may cancel, change or delay product purchase commitments with little or no notice to us and without penalty. This in turn could cause our revenue to decline and materially and adversely affect our results of operations.

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We may face claims of intellectual property infringement, which could be time-consuming, costly to defend or settle and result in the loss of significant rights and which could harm our relationships with our customers and distributors.

The semiconductor industry is characterized by companies that hold patents and other intellectual property rights and that vigorously pursue, protect and enforce intellectual property rights. From time to time, third parties may assert against us and our customers and distributors their patent and other intellectual property rights to technologies that are important to our business.

Claims that our products, processes or technology infringe third-party intellectual property rights, regardless of their merit or resolution, could be costly to defend or settle and could divert the efforts and attention of our management and technical personnel. For example, Netlist, Inc. filed suit against us in the United States District Court, Central District of California, in September 2009, alleging that our iMB™ and certain other memory module components infringe three of Netlist’s patents. For more details, see Part I, “Item 3, Legal Proceedings.”

Infringement claims also could harm our relationships with our customers or distributors and might deter future customers from doing business with us. We do not know whether we will prevail in these proceedings given the complex technical issues and inherent uncertainties in intellectual property litigation. If any pending or future proceedings result in an adverse outcome, we could be required to:

Any of the foregoing results could have a material adverse effect on our business, financial condition and results of operations.

Winning business is subject to lengthy competitive selection processes that require us to incur significant expenditures prior to generating any revenue or without any guarantee of any revenue related to this business. Even if we begin a product design, a customer may decide to cancel or change its product plans, which could cause us to generate no revenue from a product. If we fail to generate revenue after incurring substantial expenses to develop our products, our business and operating results would suffer.

We are focused on winning more competitive bid processes, known as “design wins,” that enable us to sell our high-speed analog semiconductor solutions for use in our customers’ products. These selection processes typically are lengthy and can require us to incur significant design and development expenditures and dedicate scarce engineering resources in pursuit of a single customer opportunity. We may not win the competitive selection process and may never generate any revenue despite incurring significant design and development expenditures. Failure to obtain a design win could prevent us from offering an entire generation of a product. This could cause us to lose revenue and require us to write off obsolete inventory, and could weaken our position in future competitive selection processes. Even after securing a design win, we may experience delays in generating revenue from our products as a result of the lengthy development cycle typically required. Our customers generally take a considerable amount of time to evaluate our products. Our design cycle from initial engagement to volume shipment is typically two to three years.

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The delays inherent in these lengthy sales cycles increase the risk that a customer will decide to cancel, curtail, reduce or delay its product plans or adopt a competing design from one of our competitors, causing us to lose anticipated revenue. In addition, any delay or cancellation of a customer’s plans could materially and adversely affect our financial results, as we may have incurred significant expense without generating any revenue. Finally, our customers’ failure to successfully market and sell their products could reduce demand for our products and materially and adversely affect our business, financial condition and results of operations. If we were unable to generate revenue after incurring substantial expenses to develop any of our products, our business would suffer.

Our customers require our products and our third-party contractors to undergo a lengthy and expensive qualification process which does not assure product sales. If we are unsuccessful in or delayed in qualifying any of our products with a customer, our business and operating results would suffer.

Prior to purchasing our products, our customers require that both our products and our third-party contractors undergo extensive qualification processes, which involve testing of our products in the customers’ systems, as well as testing for reliability. This qualification process may continue for several months. However, qualification of a product by a customer does not assure any sales of the product to that customer. Even after successful qualification and sales of a product to a customer, a subsequent revision in our third party contractors’ manufacturing process or our selection of a new supplier may require a new qualification process with our customers, which may result in delays and in our holding excess or obsolete inventory. After our products are qualified, it can take several months or more before the customer commences volume production of components or systems that incorporate our products. Despite these uncertainties, we devote substantial resources, including design, engineering, sales, marketing and management efforts, to qualifying our products with customers in anticipation of sales. If we are unsuccessful or delayed in qualifying any of our products with a customer, sales of those products to the customer may be precluded or delayed, which may impede our growth and cause our business to suffer.

The complexity of our products could result in undetected defects and we may be subject to warranty claims and product liability, which could result in a decrease in customers and revenue, unexpected expenses and loss of market share. In addition, our product liability insurance may not adequately cover our costs arising from products defects or otherwise.

Our products are sold as components or as modules for use in larger electronic equipment sold by our customers. A product usually goes through an intense qualification and testing period performed by our customers before being used in production. We primarily outsource our product testing to third parties and also perform some testing in our Westlake Village, California, facility. We inspect and test parts, or have them inspected and tested in order to screen out parts that may be weak or potentially suffer a defect incurred through the manufacturing process. From time to time, we are subject to warranty or product liability claims that may require us to make significant expenditures to defend these claims or pay damage awards. For example, in September 2010, we were informed of a claim related to repair and replacement costs in connection with shipments of over 4,000 integrated circuits made by us during the summer and fall of 2009. We assessed, provided and accumulated additional warranty reserves based on estimated, probable costs to replace these units. Based on our standard warranty provisions, we provided replacement parts to the customer for the known and suspected failures that had occurred. In June 2012, we entered into a settlement agreement with the customer in which we paid $1.75 million in July 2012.

Generally, our agreements seek to limit our liability to the replacement of the part or to the revenue received for the product, but these limitations on liability may not be effective or sufficient in scope in all cases. If a customer’s equipment fails in use, the customer may incur significant monetary damages including an equipment recall or associated replacement expenses, as well as lost revenue. The customer may claim that a defect in our product caused the equipment failure and assert a claim against us to recover monetary damages. The process of identifying a defective or potentially defective product in systems that have been widely distributed may be

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lengthy and require significant resources. We may test the affected product to determine the root cause of the problem and to determine appropriate solutions. We may find an appropriate solution or a temporary fix while a permanent solution is being determined. If we are unable to determine the root cause, find an appropriate solution or offer a temporary fix, we may delay shipment to customers. As a result, we may incur significant replacement costs and contract damage claims from our customers as well as harm to our reputation. In certain situations, circumstances might warrant that we consider incurring the costs or expense related to a recall of one of our products in order to avoid the potential claims that may be raised should the customer reasonably rely upon our product only to suffer a failure due to a design or manufacturing process defect. Defects in our products could harm our relationships with our customers and damage our reputation. Customers may be reluctant to buy our products, which could harm our ability to retain existing customers and attract new customers and our financial results. In addition, the cost of defending these claims and satisfying any arbitration award or judicial judgment with respect to these claims could harm our business prospects and financial condition. Although we carry product liability insurance, this insurance may not adequately cover our costs arising from defects in our products or otherwise.

We rely on our relationships with industry and technology leaders to enhance our product offerings and our inability to continue to develop or maintain such relationships in the future would harm our ability to remain competitive.

We develop many of our semiconductor products for applications in systems that are driven by industry and technology leaders in the communications and computing markets. We also work with OEMs, system manufacturers and standards bodies to define industry conventions and standards within our target markets. We believe these relationships enhance our ability to achieve market acceptance and widespread adoption of our products. If we are unable to continue to develop or maintain these relationships, our semiconductor solutions would become less desirable to our customers, our sales would suffer and our competitive position could be harmed.

If we fail to accurately anticipate and respond to market trends or fail to develop and introduce new or enhanced products to address these trends on a timely basis, our ability to attract and retain customers could be impaired and our competitive position could be harmed.

We operate in industries characterized by rapidly changing technologies and industry standards as well as technological obsolescence. We have developed products that may have long product life cycles of 10 years or more, as well as other products in more volatile high growth or rapidly changing areas, which may have shorter life cycles of only two to three years. We believe that our future success depends on our ability to develop and introduce new technologies and products that generate new sources of revenue to replace, or build upon, existing product revenue streams that may be dependent upon limited product life cycles. If we are not able to repeatedly introduce, in successive years, new products that ship in volume, our revenue will likely not grow and may decline significantly and rapidly. In 2009, we successfully introduced and began to ship a new product in production which we identify as product number INSSTE32882-GS04, or the GS04 product, and which consists of an integrated PLL and register buffer. Sales of the GS04 product comprised 18% of our total revenue in 2010. In 2010, we also began to ship in production volume a “low voltage” version of our integrated PLL and register buffer, which is shipping in the form of product number INSSTE32882LV-GS02, or the GS02 product. Sales of the GS02 product comprised 38% and 32% of our total revenue in 2011 and 2010, respectively. In 2011, we began to ship in production volume a new “ultra-low voltage” version of our integrated PLL and register buffer, which is shipping in the form of product number INSSTE32882UV-GS02, or the GS02UV product. Sales of the GS02UV product comprised 39%, 45% and 13% of our total revenue in 2013, 2012 and 2011, respectively. In 2010, we introduced and began to ship in commercial volume a dual, differential linear transimpedance amplifier that we identify as product number 2850TA-SO1D. Sales of 2850TA-SO1D product comprised 10% and 14% of our total revenue in 2013 and 2012, respectively. There were no other products that generated more than 10% of our total revenue in 2013, 2012 or 2011.

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The GS02 and GS04 products matured in 2012 and 2011, respectively and as a result, sales of both products declined and were supplanted in part by newer parts which we developed. This underscores the importance of the need for us to continually develop and introduce new products to diversify our revenue base as well as generate new revenue to replace and build upon the success of previously introduced products which may be rapidly maturing.

To compete successfully, we must design, develop, market and sell new or enhanced products that provide increasingly higher levels of performance and reliability while meeting the cost expectations of our customers. The introduction of new products by our competitors, the delay or cancellation of a platform for which any of our semiconductor solutions are designed, the market acceptance of products based on new or alternative technologies or the emergence of new industry standards could render our existing or future products uncompetitive from a pricing standpoint, obsolete and otherwise unmarketable. Our failure to anticipate or timely develop new or enhanced products or technologies in response to technological shifts could result in decreased revenue and our competitors winning design wins. In particular, we may experience difficulties with product design, manufacturing, marketing or certification that could delay or prevent our development, introduction or marketing of new or enhanced products. Although we believe our products are fully compliant with applicable industry standards, proprietary enhancements may not in the future result in full conformance with existing industry standards under all circumstances. Due to the interdependence of various components in the systems within which our products and the products of our competitors operate, customers are unlikely to change to another design, once adopted, until the next generation of a technology. As a result, if we fail to introduce new or enhanced products that meet the needs of our customers or penetrate new markets in a timely fashion, and our designs do not gain acceptance, we will lose market share and our competitive position, very likely on an extended basis, and operating results will be adversely affected.

If sufficient market demand for 100G solutions does not develop or develops more slowly than expected, or if we fail to accurately predict market requirements or market demand for 100G solutions, our business, competitive position and operating results would suffer.

We are currently investing significant resources to develop semiconductor solutions supporting 100G data transmission rates in order to increase the number of such solutions in our product line. If we fail to accurately predict market requirements or market demand for 100G semiconductor solutions, or if our 100G semiconductor solutions are not successfully developed or competitive in the industry, our business will suffer. If 100G networks are deployed to a lesser extent or more slowly than we currently anticipate, we may not realize any benefits from our investment. As a result, our business, competitive position, market share and operating results would suffer.

Our target markets may not grow or develop as we currently expect and are subject to market risks, any of which could materially harm our business, revenue and operating results.

To date, a substantial portion of our revenue has been attributable to demand for our products in the communications and computing markets and the growth of these overall markets. These markets have fluctuated in size and growth in recent times. Our operating results are impacted by various trends in these markets. These trends include the deployment and broader market adoption of next generation technologies, such as 100G and 100Gbe CMOS CDR and Serdes, in communications and enterprise networks, timing of next generation network upgrades, the introduction and broader market adoption of next generation server platforms, timing of enterprise upgrades and the introduction and deployment of high-speed memory interfaces in computing platforms. We are unable to predict the timing or direction of the development of these markets with any accuracy. In addition, because some of our products are not limited in the systems or geographic areas in which they may be deployed, we cannot always determine with accuracy how, where or into which applications our products are being deployed. If our target markets do not grow or develop in ways that we currently expect, demand for our semiconductor products may decrease and our business and operating results could suffer.

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We rely on a limited number of third parties to manufacture, assemble and test our products, and the failure to manage our relationships with our third-party contractors successfully could adversely affect our ability to market and sell our products and our reputation. Our revenue and operating results would suffer if these third parties fail to deliver products or components in a timely manner and at reasonable cost or if manufacturing capacity is reduced or eliminated as we may be unable to obtain alternative manufacturing capacity.

We operate an outsourced manufacturing business model. As a result, we rely on third-party foundry wafer fabrication and assembly and test capacity. We also perform testing in our Westlake Village, California, facility. We generally use a single foundry for the production of each of our various semiconductors. Currently, our principal foundries are SEDI, TSMC, TowerJazz Semiconductor Ltd., and WIN Semiconductors. We also use third-party contract manufacturers for a significant majority of our assembly and test operations, including Kyocera, OSE, ASE, Presto, EAG, AIC and STATS ChipPAC.

Relying on third-party manufacturing, assembly and testing presents significant risks to us, including the following:

The ability and willingness of our third-party contractors to perform is largely outside our control. If one or more of our contract manufacturers or other outsourcers fails to perform its obligations in a timely manner or at satisfactory quality levels, our ability to bring products to market and our reputation could suffer. For example, if that manufacturing capacity is reduced or eliminated at one or more facilities, including as a response to the recent worldwide decline in the semiconductor industry, or any of those facilities are unable to keep pace with the growth of our business, we could have difficulties fulfilling our customer orders and our revenue could decline. In addition, if these third parties fail to deliver quality products and components on time and at reasonable prices, we could have difficulties fulfilling our customer orders, our revenue could decline and our business, financial condition and results of operations would be adversely affected.

Additionally, as many of our fabrication and assembly and test contractors are located in the Pacific Rim region, principally in Taiwan, our manufacturing capacity may be similarly reduced or eliminated due to natural disasters, political unrest, war, labor strikes, work stoppages or public health crises, such as outbreaks of H1N1 flu. This could cause significant delays in shipments of our products until we are able to shift our manufacturing, assembly or test from the affected contractor to another third-party vendor. There can be no assurance that alternative capacity could be obtained on favorable terms, if at all.

Our costs may increase substantially if the wafer foundries that supply our products do not achieve satisfactory product yields or quality.

The wafer fabrication process is an extremely complicated process where the slightest changes in the design, specifications or materials can result in material decreases in manufacturing yields or even the suspension of production. From time to time, our third-party wafer foundries have experienced, and are likely to experience manufacturing defects and reduced manufacturing yields related to errors or problems in their manufacturing processes or the interrelationship of their processes with our designs. In some cases, our third-party wafer

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foundries may not be able to detect these defects early in the fabrication process or determine the cause of such defects in a timely manner. We may incur substantial research and development expense for prototype or development stage products as we qualify the products for production.

Generally, in pricing our semiconductors, we assume that manufacturing yields will continue to increase, even as the complexity of our semiconductors increases. Once our semiconductors are initially qualified with our third-party wafer foundries, minimum acceptable yields are established. We are responsible for the costs of the wafers if the actual yield is above the minimum. If actual yields are below the minimum we are not required to purchase the wafers. The minimum acceptable yields for our new products are generally lower at first and increase as we achieve full production. Unacceptably low product yields or other product manufacturing problems could substantially increase the overall production time and costs and adversely impact our operating results on sales of our products. Product yield losses will increase our costs and reduce our gross margin. In addition to significantly harming our operating results and cash flow, poor yields may delay shipment of our products and harm our relationships with existing and potential customers.

We do not have any long-term supply contracts with our contract manufacturers or suppliers, and any disruption in our supply of products or materials could have a material adverse affect on our business, revenue and operating results.

We currently do not have long-term supply contracts with any of our third-party contract manufacturers. We make substantially all of our purchases on a purchase order basis, and our contract manufacturers are not required to supply us products for any specific period or in any specific quantity. We expect that it would take approximately nine to 12 months to transition from our current foundry or assembly services to new providers. Such a transition would likely require a qualification process by our customers or their end customers. We generally place orders for products with some of our suppliers several months prior to the anticipated delivery date, with order volumes based on our forecasts of demand from our customers. Accordingly, if we inaccurately forecast demand for our products, we may be unable to obtain adequate and cost-effective foundry or assembly capacity from our third-party contractors to meet our customers’ delivery requirements, or we may accumulate excess inventories. On occasion, we have been unable to adequately respond to unexpected increases in customer purchase orders and therefore, were unable to benefit from this incremental demand. None of our third-party contract manufacturers have provided any assurance to us that adequate capacity will be available to us within the time required to meet additional demand for our products.

Our foundry vendors and assembly and test vendors may allocate capacity to the production of other companies’ products while reducing deliveries to us on short notice. In particular, other customers that are larger and better financed than us or that have long-term agreements with our foundry vendor or assembly and test vendors may cause our foundry vendor or assembly and test vendors to reallocate capacity to those customers, decreasing the capacity available to us. We do not have long-term supply contracts with our third-party contract manufacturers and if we enter into costly arrangements with suppliers that include nonrefundable deposits or loans in exchange for capacity commitments, commitments to purchase specified quantities over extended periods or investment in a foundry, our operating results could be harmed. We may not be able to make any such arrangement in a timely fashion or at all, and any arrangements may be costly, reduce our financial flexibility, and not be on terms favorable to us. Moreover, if we are able to secure foundry capacity, we may be obligated to use all of that capacity or incur penalties. These penalties may be expensive and could harm our financial results. To date, we have not entered into such arrangements with our suppliers. If we need another foundry or assembly and test subcontractor because of increased demand, or if we are unable to obtain timely and adequate deliveries from our providers, we might not be able to cost effectively and quickly retain other vendors to satisfy our requirements.

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Many of our customers depend on us as the sole source for a number of our products. If we are unable to deliver these products as the sole supplier or as one of a limited number of suppliers, our relationships with these customers and our business would suffer.

A number of our customers do not have alternative sources for our semiconductor solutions and depend on us as the sole supplier or as one of a limited number of suppliers for these products. Since we outsource our manufacturing to third-party contractors, our ability to deliver our products is substantially dependent on the ability and willingness of our third-party contractors to perform, which is largely outside our control. A failure to deliver our products in sufficient quantities or at all to our customers that depend on us as a sole supplier or as one of a limited number of suppliers may be detrimental to their business and, as a result, our relationship with the customer would be negatively impacted. If we are unable to maintain our relationships with these customers after such failure, our business and financial results may be harmed.

If we are unable to attract, train and retain qualified personnel, particularly our design and technical personnel, we may not be able to execute our business strategy effectively.

Our future success depends on our ability to attract and retain qualified personnel, including our management, sales and marketing, and finance, and particularly our design and technical personnel. We do not know whether we will be able to retain all of these personnel as we continue to pursue our business strategy. Historically, we have encountered difficulties in hiring qualified engineers because there is a limited pool of engineers with the expertise required in our field. Competition for these personnel is intense in the semiconductor industry. As the source of our technological and product innovations, our design and technical personnel represent a significant asset. The loss of the services of one or more of our key employees, especially our key design and technical personnel, or our inability to attract and retain qualified design and technical personnel, could harm our business, financial condition and results of operations.

We may not be able to effectively manage our growth, and we may need to incur significant expenditures to address the additional operational and control requirements of our growth, either of which could harm our business and operating results.

To effectively manage our growth, we must continue to expand our operational, engineering and financial systems, procedures and controls and to improve our accounting and other internal management systems. This may require substantial managerial and financial resources, and our efforts in this regard may not be successful. Our current systems, procedures and controls may not be adequate to support our future operations. If we fail to adequately manage our growth, or to improve our operational, financial and management information systems, or fail to effectively motivate or manage our new and future employees, the quality of our products and the management of our operations could suffer, which could adversely affect our operating results.

We face intense competition and expect competition to increase in the future. If we fail to compete effectively, it could have an adverse effect on our revenue, revenue growth rate, if any, and market share.

The global semiconductor market in general, and the communications and computing markets in particular, are highly competitive. We compete or plan to compete in different target markets to various degrees on the basis of a number of principal competitive factors, including product performance, power budget, features and functionality, customer relationships, size, ease of system design, product roadmap, reputation and reliability, customer support and price. We expect competition to increase and intensify as more and larger semiconductor companies enter our markets. Increased competition could result in price pressure, reduced profitability and loss of market share, any of which could materially and adversely affect our business, revenue and operating results.

Currently, our competitors range from large, international companies offering a wide range of semiconductor products to smaller companies specializing in narrow markets. Our primary competitors include Broadcom Corporation, Hittite Microwave Corporation, Integrated Device Technology, Inc., M/A-COM

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Technology Solutions Inc., Semtech Corp., Triquint Semiconductor and Texas Instruments Incorporated, as well as other analog signal processing companies. We expect competition in the markets in which we participate to increase in the future as existing competitors improve or expand their product offerings.

Our ability to compete successfully depends on elements both within and outside of our control, including industry and general economic trends. During past periods of downturns in our industry, competition in the markets in which we operate intensified as our customers reduced their purchase orders. Many of our competitors have substantially greater financial and other resources with which to withstand similar adverse economic or market conditions in the future. These developments may materially and adversely affect our current and future target markets and our ability to compete successfully in those markets.

We use a significant amount of intellectual property in our business. Monitoring unauthorized use of our intellectual property can be difficult and costly and if we are unable to protect our intellectual property, our business could be adversely affected.

Our success depends in part upon our ability to protect our intellectual property. To accomplish this, we rely on a combination of intellectual property rights, including patents, copyrights, trademarks and trade secrets in the United States and in selected foreign countries where we believe filing for such protection is appropriate. Effective protection of our intellectual property rights may be unavailable, limited or not applied for in some countries. Some of our products and technologies are not covered by any patent or patent application, as we do not believe patent protection of these products and technologies is critical to our business strategy at this time. A failure to timely seek patent protection on products or technologies generally precludes us from seeking future patent protection on these products or technologies. We cannot guarantee that:

In addition, our competitors or others may design around our protected patents or technologies. Effective intellectual property protection may be unavailable or more limited in one or more relevant jurisdictions relative to those protections available in the United States, or may not be applied for in one or more relevant jurisdictions. If we pursue litigation to assert our intellectual property rights, an adverse decision in any of these legal actions could limit our ability to assert our intellectual property rights, limit the value of our technology or otherwise negatively impact our business, financial condition and results of operations.

Monitoring unauthorized use of our intellectual property is difficult and costly. Unauthorized use of our intellectual property may have occurred or may occur in the future. Although we have taken steps to minimize the risk of this occurring, any such failure to identify unauthorized use and otherwise adequately protect our intellectual property would adversely affect our business. Moreover, if we are required to commence litigation, whether as a plaintiff or defendant, not only would this be time-consuming, but we would also be forced to incur

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significant costs and divert our attention and efforts of our employees, which could, in turn, result in lower revenue and higher expenses.

We also rely on contractual protections with our customers, suppliers, distributors, employees and consultants, and we implement security measures designed to protect our trade secrets. We cannot assure you that these contractual protections and security measures will not be breached, that we will have adequate remedies for any such breach or that our suppliers, employees or consultants will not assert rights to intellectual property arising out of such contracts.

In addition, we have a number of third-party patent and intellectual property license agreements. Some of these license agreements require us to make one-time payments or ongoing royalty payments. We cannot guarantee that the third-party patents and technology we license will not be licensed to our competitors or others in the semiconductor industry. In the future, we may need to obtain additional licenses, renew existing license agreements or otherwise replace existing technology. We are unable to predict whether these license agreements can be obtained or renewed or the technology can be replaced on acceptable terms, or at all.

Average selling prices of our products generally decrease over time, which could negatively impact our revenue and gross margins.

Our operating results may be impacted by a decline in the average selling prices of our semiconductors. If competition increases in our target markets, we may need to reduce the average unit price of our products in anticipation of competitive pricing pressures, new product introductions by us or our competitors and for other reasons. If we are unable to offset any reductions in our average selling prices by increasing our sales volumes or introducing new products with higher margins, our revenue and gross margins will suffer. To maintain our revenue and gross margins, we must develop and introduce new products and product enhancements on a timely basis and continually reduce our costs as well as our customers’ costs. Failure to do so would cause our revenue and gross margins to decline.

We are subject to order and shipment uncertainties, and differences between our estimates of customer demand and product mix and our actual results could negatively affect our inventory levels, sales and operating results.

Our revenue is generated on the basis of purchase orders with our customers rather than long-term purchase commitments. In addition, our customers can cancel purchase orders or defer the shipments of our products under certain circumstances. Our products are manufactured using semiconductor foundries according to our estimates of customer demand, which requires us to make separate demand forecast assumptions for every customer, each of which may introduce significant variability into our aggregate estimates. It is difficult for us to forecast the demand for our products, in part because of the complex supply chain between us and the end-user markets that incorporate our products. Due to our lengthy product development cycle, it is critical for us to anticipate changes in demand for our various product features and the applications they serve to allow sufficient time for product development and design. We have limited visibility into future customer demand and the product mix that our customers will require, which could adversely affect our revenue forecasts and operating margins. Moreover, because some of our target markets are relatively new, many of our customers have difficulty accurately forecasting their product requirements and estimating the timing of their new product introductions, which ultimately affects their demand for our products. Our failure to accurately forecast demand can lead to product shortages that can impede production by our customers and harm our customer relationships. Conversely, our failure to forecast declining demand or shifts in product mix can result in excess or obsolete inventory. For example, some of our customers may cancel purchase orders or delay the shipment of their products that incorporate our products as a result of component shortages they may experience due to the earthquakes and tsunami in Japan, or likewise with respect to the flooding in Thailand, which may result in excess or obsolete inventory and impact our sales and operating results. In addition, the rapid pace of innovation in our industry could also render significant portions of our inventory obsolete. Excess or obsolete inventory levels could result

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in unexpected expenses or increases in our reserves that could adversely affect our business, operating results and financial condition. In contrast, if we were to underestimate customer demand or if sufficient manufacturing capacity were unavailable, we could forego revenue opportunities, potentially lose market share and damage our customer relationships. In addition, any significant future cancellations or deferrals of product orders or the return of previously sold products due to manufacturing defects could materially and adversely impact our profit margins, increase our write-offs due to product obsolescence and restrict our ability to fund our operations.

We rely on third-party sales representatives and distributors to assist in selling our products. If we fail to retain or find additional sales representatives and distributors, or if any of these parties fail to perform as expected, it could reduce our future sales.

In 2013, we derived 84% of our total revenue from sales by our direct sales team and third-party sales representatives. In addition, in 2013 and 2012, approximately 16% and 15% of our sales were made through third-party distributors, respectively. Two of our distributors, which sell solely to Micron, accounted for 11% our total revenue in both 2013 and 2012. We are unable to predict the extent to which these third-party sales representatives and distributors will be successful in marketing and selling our products. Moreover, many of these third-party sales representatives and distributors also market and sell competing products, which may affect the extent to which they promote our products. Even where our relationships are formalized in contracts, our third-party sales representatives and distributors often have the right to terminate their relationships with us at any time. Our future performance will also depend, in part, on our ability to attract additional third-party sales representatives and distributors who will be able to market and support our products effectively, especially in markets in which we have not previously sold our products. If we cannot retain our current distributors or find additional or replacement third-party sales representatives and distributors, our business, financial condition and results of operations could be harmed. Additionally, if we terminate our relationship with a distributor, we may be obligated to repurchase unsold products. We record a reserve for estimated returns and price credits. If actual returns and credits exceed our estimates, our operating results could be harmed.

The facilities of our third-party contractors and distributors are located in regions that are subject to earthquakes and other natural disasters.

The facilities of our third-party contractors and distributors are subject to risk of catastrophic loss due to fire, flood or other natural or man-made disasters. A number of our facilities and those of our contract manufacturers are located in areas with above average seismic activity and also subject to typhoons and other Pacific storms. Several foundries that manufacture our wafers are located in Taiwan, Japan and California, and a majority of our third-party contractors who assemble and test our products are located in Asia. In addition, our headquarters are located in California. The risk of an earthquake in the Pacific Rim region or California is significant due to the proximity of major earthquake fault lines. Any catastrophic loss to any of these facilities would likely disrupt our operations, delay production, shipments and revenue and result in significant expenses to repair or replace the facility. In particular, any catastrophic loss at our California locations would materially and adversely affect our business.

We rely on third-party technologies for the development of our products and our inability to use such technologies in the future would harm our ability to remain competitive.

We rely on third parties for technologies that are integrated into our products, such as wafer fabrication and assembly and test technologies used by our contract manufacturers, as well as licensed architecture technologies. If we are unable to continue to use or license these technologies on reasonable terms, or if these technologies fail to operate properly, we may not be able to secure alternatives in a timely manner or at all, and our ability to remain competitive would be harmed. In addition, if we are unable to successfully license technology from third parties to develop future products, we may not be able to develop such products in a timely manner or at all.

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Our business would be adversely affected by the departure of existing members of our senior management team and other key personnel.

Our success depends, in large part, on the continued contributions of our senior management team, in particular, the services of certain key personnel, including Dr. Loi Nguyen, one of our founders and our Vice President of Networking, Communications and Multi-Market Products. In February 2011, our Chief Technology Officer resigned and we promoted our Vice President of Engineering for New Business Initiatives to serve as our new Chief Technology Officer. In February 2012, our President and Chief Executive Officer, Young K. Sohn resigned and was succeeded by Ford Tamer. Changes in our management team could negatively affect our operations and our relationships with our customers, employees and market leaders. In addition, we have not entered into non-compete agreements with members of our senior management team. The loss of any member of our senior management team or key personnel could harm our ability to implement our business strategy and respond to the rapidly changing market conditions in which we operate.

Potential future acquisitions could be difficult to integrate, divert attention of key personnel, disrupt our business, dilute stockholder value and impair our operating results.

As part of our business strategy, we have pursued and may continue to pursue acquisitions in the future that we believe will complement our business, semiconductor solutions or technologies. Any acquisition involves a number of risks, many of which could harm our business, including:

Acquisitions also frequently result in the recording of goodwill and other intangible assets that are subject to potential impairments, which could harm our financial results. As a result, if we fail to properly evaluate acquisitions or investments, we may not achieve the anticipated benefits of any such acquisitions, and we may incur costs in excess of what we anticipate. The failure to successfully evaluate and execute acquisitions or investments or otherwise adequately address these risks could materially harm our business and financial results.

Our portfolio of marketable securities is significant and subject to market, interest and credit risk that may reduce its value.

We maintain a significant portfolio of marketable securities. Changes in the value of this portfolio could adversely affect our earnings. In particular, the value of our investments may decline due to increases in interest

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rates, downgrades of money market funds, U.S. Treasuries, municipal bonds, corporate bonds, certificates of deposit and asset backed securities included in our portfolio, instability in the global financial markets that reduces the liquidity of securities included in our portfolio, declines in the value of collateral underlying the asset-backed securities included in our portfolio and other factors. Each of these events may cause us to record charges to reduce the carrying value of our investment portfolio or sell investments for less than our acquisition cost. Although we attempt to mitigate these risks by investing in high quality securities and continuously monitoring our portfolio’s overall risk profile, the value of our investments may nevertheless decline.

Tax benefits that we receive may be terminated or reduced in the future, which would increase our costs.

In 2010, we began to expand our international presence to take advantage of the opportunity to recruit additional engineering design talent, as well as to more closely align our operations geographically with our customers and suppliers in Asia. In certain international jurisdictions, we have also entered into agreements with local governments to provide us with, among other things, favorable local tax rates if certain minimum criteria are met. These agreements may require us to meet several requirements as to investment, headcount and activities to retain this status. We currently believe that we will be able to meet all the terms and conditions specified in these agreements. However, if adverse changes in the economy or changes in technology affect international demand for our products in an unforeseen manner or if we fail to otherwise meet the conditions of the local agreements, we may be subject to additional taxes, which in turn would increase our costs.

Changes in our effective tax rate may harm our results of operations. A number of factors may increase our future effective tax rates, including:

We are subject to additional regulatory compliance requirements, including Section 404 of the Sarbanes-Oxley Act of 2002, as a result of being a public company and our management has limited experience managing a public company.

As a public company, we will incur significant legal, accounting and other expenses that we did not incur as a private company. Our management team and other personnel will need to devote a substantial amount of time to new compliance initiatives and we may not successfully or efficiently manage our transition into a public company. We expect rules and regulations such as the Sarbanes-Oxley Act of 2002 to increase our legal and finance compliance costs and to make some activities more time-consuming and costly. We will need to hire a number of additional employees with public accounting and disclosure experience in order to meet our ongoing obligations as a public company. For example, Section 404 of the Sarbanes-Oxley Act of 2002 requires that our management report on, and our independent registered public accounting firm attest to, the effectiveness of our

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internal control over financial reporting in our annual report on Form 10-K starting fiscal year ended December 31, 2011. Section 404 compliance has in the past and may continue to divert internal resources and require significant amount of time and effort to complete. If we fail to do so, or if in the future our Chief Executive Officer, Chief Financial Officer or independent registered public accounting firm determines that our internal controls over financial reporting are not effective as defined under Section 404, we could be subject to sanctions or investigations by The New York Stock Exchange, or NYSE, the Securities and Exchange Commission, or the SEC, or other regulatory authorities. Furthermore, investor perceptions of our company may suffer, and this could cause a decline in the market price of our stock. Irrespective of compliance with Section 404, any failure of our internal controls could have a material adverse effect on our stated results of operations and harm our reputation. If we are unable to implement these changes effectively or efficiently, it could harm our operations, financial reporting or financial results and could result in an adverse opinion on internal controls from our independent auditors.

Risks Related to Our Industry

We may be unable to make the substantial and productive research and development investments, which are required to remain competitive in our business.

The semiconductor industry requires substantial investment in research and development in order to develop and bring to market new and enhanced technologies and products. Many of our products originated with our research and development efforts and have provided us with a significant competitive advantage. Our research and development expense was $50.5 million in 2013, $40.1 million in 2012 and $28.6 million in 2011. We are committed to investing in new product development in order to remain competitive in our target markets. We do not know whether we will have sufficient resources to maintain the level of investment in research and development required to remain competitive. In addition, we cannot assure you that the technologies which are the focus of our research and development expenditures will become commercially successful.

Our business, financial condition and results of operations could be adversely affected by worldwide economic conditions, as well as political and economic conditions in the countries in which we conduct business.

Our business and operating results are impacted by worldwide economic conditions. Uncertainty about current global economic conditions may cause businesses to continue to postpone spending in response to tighter credit, unemployment or negative financial news. This in turn could have a material negative effect on the demand for our semiconductor products or the products into which our semiconductors are incorporated. Multiple factors relating to our international operations and to particular countries in which we operate could negatively impact our business, financial condition and results of operations. These factors include:

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A significant portion of our products are manufactured, assembled and tested outside the United States. Any conflict or uncertainty in these countries, including due to natural disasters, public health concerns, political unrest or safety concerns, could harm our business, financial condition and results of operations. In addition, if the government of any country in which our products are manufactured or sold sets technical standards for products manufactured in or imported into their country that are not widely shared, it may lead some of our customers to suspend imports of their products into that country, require manufacturers in that country to manufacture products with different technical standards and disrupt cross-border manufacturing relationships which, in each case, could harm our business.

Changes in current or future laws or regulations or the imposition of new laws or regulations, including new or changed tax regulations, environmental laws and export control laws, or new interpretations thereof, by federal or state agencies or foreign governments could impair our ability to compete in international markets.

Changes in current laws or regulations applicable to us or the imposition of new laws and regulations in the United States or other jurisdictions in which we do business, such as China, Japan, Korea, Singapore and Taiwan, could materially and adversely affect our business, financial condition and results of operations. For example, we have entered into agreements with local governments to provide us with, among other things, favorable local tax rates if certain minimum criteria are met, as discussed in our risk factor entitled “Tax benefits that we received may be terminated or reduced in the future, which would increase our costs.” These agreements may require us to meet several requirements as to investment, headcount and activities to retain this status. If we fail to otherwise meet the conditions of the local agreements, we may be subject to additional taxes, which in turn would increase our costs. In addition, potential future U.S. tax legislation could impact the tax benefits we effectively realize under these agreements.

Due to environmental concerns, the use of lead and other hazardous substances in electronic components and systems is receiving increased attention. In response, the European Union passed the Restriction on Hazardous Substances, or RoHS, Directive, legislation that limits the use of lead and other hazardous substances in electrical equipment. The RoHS Directive became effective July 1, 2006. We believe that our current product designs and material supply chains are in compliance with the RoHS Directive. If our product designs or material supply chains are deemed not to be in compliance with the RoHS Directive, we and our third party manufacturers may need to redesign products with components meeting the requirements of the RoHS Directive and we may incur additional expense as well as loss of market share and damage to our reputation.

In addition, we are subject to export control laws, regulations and requirements that limit which products we sell and where and to whom we sell our products. In some cases, it is possible that export licenses would be required from U.S. government agencies for some of our products in accordance with the Export Administration Regulations and the International Traffic in Arms Regulations. We may not be successful in obtaining the necessary export licenses in all instances. Any limitation on our ability to export or sell our products imposed by these laws would adversely affect our business, financial condition and results of operations. In addition, changes in our products or changes in export and import laws and implementing regulations may create delays in the introduction of new products in international markets, prevent our customers from deploying our products

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internationally or, in some cases, prevent the export or import of our products to certain countries altogether. While we are not aware of any other current or proposed export or import regulations which would materially restrict our ability to sell our products in countries such as China, Japan, Korea, Singapore or Taiwan, any change in export or import regulations or related legislation, shift in approach to the enforcement or scope of existing regulations, or change in the countries, persons or technologies targeted by these regulations, could result in decreased use of our products by, or in our decreased ability to export or sell our products to, existing or potential customers with international operations. In such event, our business and results of operations could be adversely affected.

Our product or manufacturing standards could also be impacted by new or revised environmental rules and regulations or other social initiatives. For instance, the SEC adopted new disclosure requirements in 2012 relating to the sourcing of certain minerals from the Democratic Republic of Congo and certain other adjoining countries. Those new rules, which will require reporting in 2014, could adversely affect our costs, the availability of minerals used in our products and our relationships with customers and suppliers. Also, since our supply chain is complex, we may face reputational challenges with our customers, stockholders, and other stakeholders if we are unable to sufficiently verify the origins for any conflict minerals used in the products that we sell.

We are subject to the cyclical nature of the semiconductor industry, which has suffered and may suffer from future recessionary downturns.

The semiconductor industry is highly cyclical and is characterized by constant and rapid technological change, rapid product obsolescence and price erosion, evolving standards and wide fluctuations in product supply and demand. The industry experienced a significant downturn during the current global recession. These downturns have been characterized by diminished product demand, production overcapacity, high inventory levels and accelerated erosion of average selling prices. The most recent downturn and any future downturns could negatively impact our business and operating results. Furthermore, any upturn in the semiconductor industry could result in increased competition for access to third-party foundry and assembly capacity. We are dependent on the availability of this capacity to manufacture and assemble our integrated circuits. None of our third-party foundry or assembly contractors has provided assurances that adequate capacity will be available to us in the future.

Our products must conform to industry standards in order to be accepted by end users in our markets.

Our products comprise only a part of larger electronic systems. All components of these systems must uniformly comply with industry standards in order to operate efficiently together. These industry standards are often developed and promoted by larger companies who are industry leaders and provide other components of the systems in which our products are incorporated. In driving industry standards, these larger companies are able to develop and foster product ecosystems within which our products can be used. We work with a number of these larger companies in helping develop industry standards with which our products are compatible. If larger companies do not support the same industry standards that we do, or if competing standards emerge, market acceptance of our products could be adversely affected, which would harm our business.

Some industry standards may not be widely adopted or implemented uniformly, and competing standards may still emerge that may be preferred by our customers. Products for communications and computing applications are based on industry standards that are continually evolving. Our ability to compete in the future will depend on our ability to identify and ensure compliance with these evolving industry standards. The emergence of new industry standards could render our products incompatible with products developed by other suppliers or make it difficult for our products to meet the requirements of certain OEMs. As a result, we could be required to invest significant time and effort and to incur significant expense to redesign our products to ensure compliance with relevant standards. If our products are not in compliance with prevailing industry standards for a significant period of time, we could miss opportunities to achieve crucial design wins. We may not be successful in developing or using new technologies or in developing new products or product enhancements that achieve market acceptance. Our pursuit of necessary technological advances may require substantial time and expense.

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Risks Related to our Common Stock

The trading price and volume of our common stock is subject to price volatility.

The trading price of our common stock has experienced wide fluctuations. For example, since our initial public offering the closing price of our common stock has ranged from $7.20 to $26.63. Volatility in the market price of our common stock may occur in the future. The market price of shares of our common stock could be subject to wide fluctuations in response to many risk factors listed in this report and others beyond our control, including:

Furthermore, the stock markets have experienced extreme price and volume fluctuations that have affected and continue to affect the market prices of equity securities of many companies. These fluctuations often have been unrelated or disproportionate to the operating performance of those companies. These broad market and industry fluctuations, as well as general economic, political and market conditions such as recessions, interest rate changes or international currency fluctuations, may cause the market price of shares of our common stock to decline. In the past, companies that have experienced volatility in the market price of their stock have been subject to securities class action litigation. We may be the target of this type of litigation in the future. Securities litigation against us could result in substantial costs and divert our management’s attention from other business concerns, which could seriously harm our business.

Due to the nature of our compensation program, our executive officers can sell shares of our common stock, often pursuant to trading plans established under Rule 10b5-1 of the Exchange Act. As a result, sales of common stock by our executive officers may not be indicative of their respective opinions of our performance at the time of sale or of our potential future performance. Nonetheless, the market price of our stock may be affected by sales of shares by our executive officers.

If securities or industry analysts do not publish research or reports about our business, or if they change their recommendations regarding our stock adversely, our stock price and trading volume could decline.

The trading market for our common stock will be influenced by the research and reports that industry or securities analysts publish about us or our business. If one or more of the analysts who cover us downgrade our

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stock, our stock price would likely decline. If one or more of these analysts cease coverage of our company or fail to regularly publish reports on us, we could lose visibility in the financial markets, which in turn could cause our stock price or trading volume to decline.

We may not be able to obtain capital when desired on favorable terms, if at all, or without dilution to our stockholders and our failure to raise capital when needed could prevent us from executing our growth strategy.

We believe that our existing cash and cash equivalents, investments in marketable securities, and cash flows from our operating activities, will be sufficient to meet our anticipated cash needs for at least the next 12 to 18 months. We operate in an industry, however, that makes our prospects difficult to evaluate. It is possible that we may not generate sufficient cash flow from operations or otherwise have the capital resources to meet our future capital needs. If this occurs, we may need additional financing to execute on our current or future business strategies, including to:

If we raise additional funds through the issuance of equity or convertible debt securities, the percentage ownership of our stockholders could be significantly diluted, and these newly-issued securities may have rights, preferences or privileges senior to those of existing stockholders. If we raise additional funds by obtaining loans from third parties, the terms of those financing arrangements may include negative covenants or other restrictions on our business that could impair our operational flexibility, and would also require us to incur interest expense. We have not made arrangements to obtain additional financing and there is no assurance that additional financing will be available on terms favorable to us, or at all. If adequate funds are not available or are not available on acceptable terms, if and when needed, our ability to fund our operations, take advantage of unanticipated opportunities, develop or enhance our products, or otherwise respond to competitive pressures could be significantly limited.

Delaware law and our corporate charter and bylaws contain anti-takeover provisions that could delay or discourage takeover attempts that stockholders may consider favorable.

Provisions in our certificate of incorporation and bylaws, may have the effect of delaying or preventing a change of control or changes in our management. These provisions include the following:

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In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law. These provisions may prohibit or restrict large stockholders, in particular those owning 15% or more of our outstanding voting stock, from merging or combining with us. These provisions in our certificate of incorporation and bylaws and under Delaware law could discourage potential takeover attempts and could reduce the price that investors might be willing to pay for shares of our common stock in the future and result in our market price being lower than it would without these provisions.

We do not currently intend to pay dividends on our common stock and, consequently, your ability to achieve a return on your investment will depend on appreciation in the price of our common stock.

We have never declared or paid any cash dividends on our common stock and do not currently intend to do so for the foreseeable future. We currently intend to invest our future earnings, if any, to fund our growth. Therefore, you are not likely to receive any dividends on your common stock for the foreseeable future and the success of an investment in shares of our common stock will depend upon any future appreciation in their value. There is no guarantee that shares of our common stock will appreciate in value or even maintain the price at which our stockholders have purchased their shares.

None.

We lease 28,957 square feet of office space in Santa Clara, California which currently serves as our principal executive office and the lease will expire on April 10, 2018. We also lease 29,090 square feet of office space in Westlake Village, California under a lease that expires on December 31, 2016, which we amended in 2012 to expand the leased space by 11,432 square feet for sixty months starting January 1, 2013 through December 31, 2017. Our Singapore subsidiary currently leases 2,368 square feet of office space in Singapore under a lease that expires on May 31, 2014. Our United Kingdom subsidiary currently leases office space in Northamptonshire, England under a lease that expires on March 30, 2016. We believe that current facilities, are sufficient to meet our needs for the foreseeable future. For additional information regarding our obligations under property leases, see Note 14 of Notes to Consolidated Financial Statements, included in Part II, “Item 8, Financial Statements and Supplementary Data”.

We are currently a party to the following legal proceedings:

Netlist, Inc. v. Inphi Corporation, Case No. 09-cv-6900 (C.D. Cal.)

On September 22, 2009, Netlist filed suit in the United States District Court, Central District of California, or the Court, asserting that we infringe U.S. Patent No. 7,532,537. Netlist filed an amended complaint on December 22, 2009, further asserting that we infringe U.S. Patent Nos. 7,619,912 and 7,636,274, collectively with U.S. Patent No. 7,532,537, the patents-in-suit, and seeking both unspecified monetary damages to be determined and an injunction to prevent further infringement. These infringement claims allege that our iMB™ and certain other memory module components infringe the patents-in-suit. We answered the amended complaint on February 11, 2010 and asserted that we do not infringe the patents-in-suit and that the patents-in-suit are invalid. In 2010, we filed inter partes requests for reexamination with the United States Patent and Trademark Office (the “USPTO”), asserting that the patents-in-suit are invalid.

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On August 27, 2010, the USPTO ordered the request for Inter Partes Reexamination for U.S. Patent No. 7,636,274 and found a substantial new question of patentability based upon each of the different issues that we raised as the reexamination requestor. On September 27, 2011, the Patent Office issued a First Office Action based on the Netlist ‘274 Patent Reexamination Request and rejected 91 of its 97 claims. On October 27, 2011, Netlist responded to the USPTO determination by amending some but not all of the claims, adding new claims and making arguments as to the validity of the rejected claims in view of the cited references. We provided rebuttable comments to the USPTO on November 28, 2011. On March 12, 2012, the Examiner issued an Action Closing Prosecution, indicating that the claims pending contain allowable subject matter, and Netlist did not respond to the Action Closing Prosecution in the time provided by the USPTO. On June 22, 2012, the USPTO issued a Right of Appeal Notice, and on July 23, 2012, we filed a Notice of Appeal. We filed the Appeal Brief on September 24, 2012 and Netlist filed its Responsive Brief on October 24, 2012. The parties received an Examiner’s Answer dated April 16, 2013 from the USPTO that maintained the rejections set forth on the Right of Appeal Notice dated June 22, 2012. We filed a Rebuttal Brief on May 16, 2013 and a Request for Oral Hearing on June 7, 2013. The appeal hearing took place on November 20, 2013. The Patent Trial and Appeal Board (PTAB) issued its decision on January 16, 2014, finding the Examiner erred in declining to adopt 8 of the 9 different rejections that had been proposed by us. We requested a rehearing of the decision not to adopt the remaining one rejection that had been proposed by us and was not adopted by the PTAB and is awaiting a response to that request, while Netlist has requested and been granted a one-month extension of time regarding its response to the PTAB decision. The proceeding is expected to continue in accordance with established Inter Partes Reexamination procedures.

On September 8, 2010, the USPTO ordered the request for Inter Partes Reexamination for U.S. Patent No. 7,532,537 and found a substantial new question of patentability based upon different issues we raised as the reexamination requestor. The USPTO accompanied this Reexamination Order of U.S. Patent No. 7,532,537 with its own evaluation of the validity of this patent, and rejected some but not all of claims. In a response dated October 8, 2010, Netlist responded to the USPTO determination by amending some but not all of the claims, adding new claims and making arguments as to why the claims were not invalid in view of the cited references. We provided rebuttable comments to the USPTO on November 8, 2010 along with a Petition requesting an increase in the number of allowed pages of the rebuttable comments. On January 20, 2011, the USPTO granted the Petition in part. We then filed updated rebuttal comments on January 27, 2011 in compliance with the granted Petition. The USPTO has considered these updated rebuttal comments, and in a communication dated June 15, 2011, continued to reject all the previously rejected claims. The USPTO also rejected all the claims newly added in the October 8, 2010 Netlist response. In a further communication dated June 21, 2011, the USPTO issued an Action Closing Prosecution indicating that it would confirm the patentability of four claims and reject all the other pending claims. On August 22, 2011, Netlist responded to the Action Closing Prosecution by further amending some claims and making arguments as to the validity of the rejected claims in view of the cited references. We submitted rebuttal comments on September 21, 2011. In a further communication dated February 7, 2012, the USPTO issued a Right of Appeal Notice, which also indicated that the previous amendments to claim made by Netlist would be entered, and that the current pending claims, as amended, were patentable. We filed a Notice of Appeal at the USPTO on March 8, 2012, within the time period provided for filing the Notice of Appeal and Netlist did not file Notice of Cross-Appeal. We filed its Appeal Brief on May 8, 2012, and Netlist filed its Responsive Brief on July 2, 2012. The parties received an Examiner’s Answer dated April 16, 2013 from the USPTO that maintained the rejections set forth on the Right of Appeal Notice dated February 7, 2012. We filed a Rebuttal Brief on May 16, 2013 and a Request for Oral Hearing on June 7, 2013. The appeal hearing took place in front of the PTAB on November 20, 2013. The PTAB issued its decision on January 16, 2014, affirming the Examiner’s decision as to all of the challenged claims. We since made a request for rehearing of the decision, and are awaiting a response to that request, as the next substantive step of the proceeding, as prosecution otherwise remains closed. The proceeding is expected to continue in accordance with established Inter Partes Reexamination procedures.

On September 8, 2010, the USPTO ordered the request for Inter Partes Reexamination for U.S. Patent No. 7,619,912 and found a substantial new question of patentability based upon different issues we raised as the

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reexamination requestor. The USPTO accompanied this Reexamination Order of U.S. Patent No. 7,619,912 with its own evaluation of the validity of this patent, and initially determined that all of the claims were patentable based upon our request for Inter Partes Reexamination. Netlist did not comment upon this Reexamination Order. The USPTO on February 28, 2011 also merged the Proceedings of the Reexamination of U.S. Patent No. 7,619,912, bearing Control No. 90/001,339 with Inter Partes Reexamination Proceeding 95/000,578 filed October 20, 2010 on behalf of SMART Modular Technologies, Inc. and Inter Partes Reexamination Proceeding 95/000,579 filed October 21, 2010 on behalf of Google, Inc. In each of these other Reexamination Proceedings, the USPTO had indicated that there existed a substantial new question of patentability with respect to certain claims of U.S. Patent No. 7,619,912, but had not accompanied the Reexamination Orders related thereto with its own evaluation of the validity of this patent, indicating that such evaluation would be forthcoming at a later time. This further evaluation was received in an Office Action dated April 4, 2011, in which the Examiner rejected a substantial majority of the claims based upon a number of different rejections, including certain of the rejections originally proposed by us in our Request for Reexamination. This Office Action also indicated that one claim was deemed to be patentable over the prior art of record in the merged Reexamination Proceedings. After seeking and obtaining an extension of time to respond to the Office Action dated April 4, 2011, Netlist served its response on July 5, 2011, which added new claims and made arguments as to why the originally filed claims were not invalid in view of the cited references. Each of the merged Reexamination Requestors, including us, submitted rebuttal comments by August 29, 2011. The USPTO considered this Netlist response and each of the rebuttal comments, and in an Office Action dated October 14, 2011, continued to reject most, but not all of the previously rejected claims, as well as rejected claims that had been added by Netlist in its July 5, 2011 response. After seeking and obtaining an extension of time to respond to the Office Action dated October 14, 2011, Netlist served its response on January 13, 2012, which response made amendments based upon subject matter that had been indicated as allowable in the Office Action dated October 14, 2011, added other new claims and made arguments as to why all of these claims should be allowed. The three different merged Reexamination Requestors, including us, timely submitted rebuttal comments on or about February 13, 2012. The USPTO issued a Non-final Office Action on November 13, 2012, rejecting some claims and indicating that others contained allowable subject matter. On January 14, 2013, Netlist filed a Response to the Non-final Office Action which presented further claim amendments and evidence supporting its positions regarding patentability. Rebuttal comments from us and the other Requestors were filed on February 13, 2013. The parties are still awaiting for the PTO’s position as to the patentability of the claims in their current form based on these recently filed communications. The merged proceeding is expected to continue in accordance with established Inter Partes Reexamination procedures.

The reexamination proceedings could result in a determination that the patents-in-suit, in whole or in part, are valid or invalid, as well as modifications of the scope of the patents-in-suit.

Based on these papers the Court in January 2014 ordered a continued stay of the proceedings, took the litigation off the active court calendar, and requested that the parties file a joint status report on May 1, 2014 and every 120 days thereafter advising the Court as to status of the reexamination proceedings at which times, the Court could decide to maintain or lift the stay.

While we intend to defend the foregoing lawsuit vigorously, litigation, whether or not determined in our favor or settled, could be costly and time-consuming and could divert management’s attention and resources, which could adversely affect our business.

Based on the nature of the litigation, we are currently unable to predict the final outcome of this lawsuit and therefore, cannot determine the likelihood of loss nor estimate a range of possible loss. However, because of the nature and inherent uncertainties of litigation, should the outcome of these actions be unfavorable, our business, financial condition, results of operations or cash flows could be materially and adversely affected.

We are not currently a party to any other material litigation. The semiconductor industry is characterized by frequent claims and litigation, including claims regarding patent and other intellectual property rights as well as

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improper hiring practices. We may from time to time become involved in litigation relating to claims arising from our ordinary course of business. These claims, even if not meritorious, could result in the expenditure of significant financial and managerial resources.

Not applicable.

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PART II

Market for Registrant’s Common Equity

Our common stock is traded on the New York Stock Exchange under the symbol “IPHI”. The following table sets forth the range of high and low sales prices for our common stock in each quarter:

As of February 27, 2014, we had approximately 40 holders of record of our common stock. This number does not include the number of persons whose shares are in nominee or in “street name” accounts through brokers.

We have never declared or paid any cash dividends on shares of our capital stock. We expect to retain all of our earnings to finance the expansion and development of our business and we do not currently intend to pay any cash dividends on our capital stock in the foreseeable future. Our board of directors will determine future dividends, if any.

Director and Executive Officers have currently and may from time to time in the future, establish pre-set trading plans in accordance with Rule 10b5-1 promulgated under the Securities Exchange Act of 1934.

Securities Authorized for Issuance under Equity Compensation Plans

Information regarding the securities authorized for issuance under our equity compensation plans can be found under Part III, “Item 12, Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters”.

Share Performance Graph

The following information is not deemed to be “soliciting material” or to be “filed” with the Securities and Exchange Commission or subject to Regulation 14A or 14C under the Securities Exchange Act of 1934 or to the liabilities of Section 18 of the Securities Exchange Act of 1934, and will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except to the extent we specifically incorporate it by reference into such a filing.

Set forth below is a line graph showing the cumulative total stockholder return (change in stock price plus reinvested dividends) assuming the investment of $100 on November 11, 2010 (the day of our initial public offering) in each of our common stock, the S&P 500 Index and PHLX Semiconductor Index for the period commencing on November 11, 2010 and ending on December 31, 2013. The comparisons in the table are required by the Securities and Exchange Commission and are not intended to forecast or be indicative of future performance of our common stock.

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The following selected consolidated financial data should be read together with Part II, “Item 7., Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements and related notes included elsewhere in this report. The selected balance sheet data as of December 31, 2013 and 2012, and the selected statements of operations data for each of the years ended December 31, 2013, 2012 and 2011, have been derived from our audited financial statements included elsewhere in this report. The selected balance sheet data as of December 31, 2011, 2010 and 2009 and the selected statements of operations data for the years ended December 31, 2010 and 2009 have been derived from our audited financial statements not included in this report. Historical results are not necessarily indicative of the results to be expected in the future.

Footnotes continued on the following page.

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Footnotes continued from the prior page.

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This report contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. When used in this report, the terms “may,” “might,” “will,” “objective,” “intend,” “should,” “could,” “can,” “would,” “expect,” “believe,” “estimate,” “predict,” “potential,” “plan,” or the negative of these terms, and similar expressions intended to identify forward-looking statements. These statements are statements that relate to future periods and include statements regarding our anticipated trends and challenges in our business and the markets in which we operate, including the market for 40G and 100G high-speed analog semiconductor solutions, our plans for future products, expansion of our product offerings and enhancements of existing products, our expectations regarding our expenses and revenue, sources of revenue, our tax benefits, the benefits of our products and services, timing of the development of our products, our anticipated cash needs and our estimates regarding our capital requirements and our needs for additional financing, our anticipated growth and growth strategies, our ability to retain and attract customers, particularly in light of our dependence on a limited number of customers for a substantial portion of our revenue, our expectations regarding competition, interest rate sensitivity, adequacy of our disclosure controls, our legal proceedings and warranty claims. These forward-looking statements involved known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by these or any other forward-looking statements. These risks and uncertainties include, but are not limited to, those risks discussed below, as well as factors affecting our results of operations, our ability to manage our growth, our ability to sustain or increase profitability, demand for our solutions, the effect of declines in average selling prices for our products, our ability to compete, our ability to rapidly develop new technology and introduce new products, our ability to safeguard our intellectual property, trends in the semiconductor industry and fluctuations in general economic conditions, and the risks set forth throughout this Report, including the risks set forth under Part I, “ Item 1A, Risk Factors”. Readers are cautioned not to place undue reliance on these forward-looking statements, which are based on current expectations and reflect management’s opinions only as of the date hereof. These forward-looking statements speak only as of the date of this Report. We expressly disclaim any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in our expectations with regard thereto or any changes in events, conditions or circumstances on which any such statement is based.

The following discussion and analysis should be read in conjunction with the consolidated financial statements and related notes that are included elsewhere in this Annual Report on Form 10-K.

Overview

We are a fabless provider of high-speed analog and mixed signal semiconductor solutions for the communications, datacenter and computing markets. We often refer to our business as covering various data transport segments from “fiber to memory”. Our analog and mixed signal semiconductor solutions provide high signal integrity at leading-edge data speeds while reducing system power consumption. Our semiconductor solutions are designed to address bandwidth bottlenecks in networks, maximize throughput and minimize latency in computing environments and enable the rollout of next generation communications, datacenter and computing infrastructures. Our solutions provide a vital high-speed interface between analog signals and digital information in high-performance systems such as telecommunications transport systems, enterprise networking equipment, datacenter and enterprise servers, storage platforms, test and measurement equipment and military systems. We provide 40G and 100G high-speed analog semiconductor solutions for the communications market and high-speed memory interface solutions for the computing market. We have a wide range product portfolio with many products sold in communication and datacenter markets as of December 31, 2013. We have ongoing, informal collaborative discussions with industry and technology leaders such as AMD, Cisco, Alcatel-Lucent, Ciena, Huawei, Juniper and Intel to design architectures and products that solve bandwidth bottlenecks in existing and next generation communications and computing systems. Although we do not have any formal agreements with

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these entities, we engage in informal discussions with these entities with respect to anticipated technological challenges, next generation customer requirements and industry conventions and standards. We help define industry conventions and standards within the markets we target by collaborating with technology leaders, OEMs, systems manufacturers and standards bodies.

The history of our product development and sales and marketing efforts is as follows:

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Our products are designed into systems sold by OEMs, including Alcatel-Lucent, Ciena, Cisco, Dell, EMC, HP, IBM, Juniper and Oracle. We believe we are one of a limited number of suppliers to these OEMs, and in some cases we may be the sole supplier for certain applications. We sell both directly to these OEMs and to module manufacturers, original design manufacturers, or ODMs, and subsystems providers that, in turn, sell to these OEMs. During the year ended December 31, 2013, we sold our products to more than 160 customers. A significant portion of our revenue has been generated by a limited number of customers. Sales to Samsung, including its subcontractors accounted for 20% and 23% of our total revenue and sales directly and through distributors to Micron accounted for 11% and 14% of our total revenue for the years ended December 31, 2013 and 2012, respectively. In addition, sales to SK Hynix, including its subcontractor accounted for 16% and 15% of our total revenue for the years ended December 31, 2013 and 2012, respectively. Substantially all of our sales to date, including our sales to Samsung, Micron and SK Hynix, are made on a purchase order basis. Since the beginning of 2006, we have shipped more than 100 million high-speed analog semiconductors. Our total revenue increased to $102.7 million for the year ended December 31, 2013 from $91.2 million for the year ended December 31, 2012. As of December 31, 2013, our accumulated deficit was $66.6 million.

Sales to customers in Asia accounted for 71%, 65% and 69% of our total revenue in 2013, 2012 and 2011, respectively. Because many of our customers or their OEM manufacturers are located in Asia, we anticipate that a majority of our future revenue will continue to come from sales to that region. Although a large percentage of our sales are made to customers in Asia, we believe that a significant number of the systems designed by these customers are then sold to end users outside Asia.

In April 2010, we received approval from the government of Singapore to set up an international headquarters from which to conduct our international operations. Because of its geographic alignment with suppliers and customers, we established our operations in Singapore to become a new international headquarters office for receiving and fulfilling orders for product shipped to locations outside the United States. Singapore has a strong university system and an established group of technology-based companies from which to recruit new engineers. We intend to build a team of engineering capability in Singapore both for development as well as testing associated with manufacturing. International operations in Singapore commenced on May 1, 2010 and during 2010, we transitioned our international operations from the United States to our Singapore subsidiary.

Demand for new features changes rapidly. It is difficult for us to forecast the demand for our products, in part because of the complex supply chain between us and the end-user markets that incorporate our products. Due to our lengthy product development cycle, it is critical for us to anticipate changes in demand for our various product features and the applications they serve to allow sufficient time for product development and design. Our failure to accurately forecast demand can lead to product shortages that can impede production by our customers and harm our customer relationships. Conversely, our failure to forecast declining demand or shifts in product mix can result in excess or obsolete inventory.

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Although revenue generated by each design win and the timing of the recognition of that revenue can vary significantly, we consider ongoing design wins to be a key factor in our future success. We consider a design win to occur when an OEM or contract manufacturer notifies us that it has selected our products to be incorporated into a product or system under development. The design win process is typically lengthy, and as a result, our sales cycles will vary based on the market served, whether the design win is with an existing or new customer and whether our product is under consideration for inclusion in a first or subsequent generation product. In addition, our customers’ products that incorporate our semiconductors can be complex and can require a substantial amount of time to define, design and produce in volume. As a result, we can incur significant design and development expenditures in circumstances where we do not ultimately recognize, or experience delays in recognizing revenue. Our customers generally order our products on a purchase order basis. We do not have any long-term purchase commitments (in excess of one year) from any of our customers. Once our product is incorporated into a customer’s design, however, we believe that our product is likely to continue to be purchased for that design throughout that product’s life cycle because of the time and expense associated with redesigning the product or substituting an alternative semiconductor. Our design cycle from initial engagement to volume shipment is typically two to three years. Product life cycles in the markets we serve typically range from two to 10 years or more and vary by application.

Summary of Consolidated Financial Results

As discussed in more detail below, for the year ended December 31, 2013 compared to the year ended December 31, 2012, we delivered the following financial performance:

The increase in our revenue for the year ended December 31, 2013 was a result of an increase in consumption of our dual, differential linear TIAs, iPHY 100Gbe CMOS gearbox products and iMB™.

Total operating expenses increased due primarily to an increase in headcount and stock-based compensation. Our expenses primarily consist of personnel costs, which include compensation, benefits, payroll related taxes and stock-based compensation. In addition, in 2013, we hired 64 new employees, primarily in the engineering department. We expect expenses to continue to increase in absolute dollars as we continue to invest resources to develop more products, to support the growth of our business. Our provision for income taxes decreased by $11.9 million due to the establishment of a valuation allowance against deferred tax assets in 2012 based on the assessment made at year-end that considered factors such as passage of new California tax law and our cumulative losses in U.S., Singapore and Taiwan after considering permanent tax differences. Our diluted loss per share decreased primarily due to establishment of valuation allowance against deferred tax assets during the year ended December 31, 2012 partially offset by increase in operating loss.

Critical Accounting Policies and Significant Management Estimates

Our consolidated financial statements are prepared in accordance with U.S. Generally Accepted Accounting Principles, or GAAP. In connection with the preparation of our consolidated financial statements, we are required to make assumptions and estimates about future events, and apply judgments that affect the reported amounts of assets, liabilities, revenue, expenses and the related disclosures. We base our assumptions, estimates and judgments on historical experience, current trends and other factors that management believes to be relevant at

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the time our consolidated financial statements are prepared. On a regular basis, we review the accounting policies, assumptions, estimates and judgments to ensure that our consolidated financial statements are presented fairly and in accordance with GAAP. However, because future events and their effects cannot be determined with certainty, actual results could differ from our assumptions and estimates, and such differences could be material.

Our significant accounting policies are discussed in note 1 of the notes to our consolidated financial statements. We believe that the following accounting estimates are the most critical to aid in fully understanding and evaluating our reported financial results, and they require our most difficult, subjective or complex judgments, resulting from the need to make estimates about the effect of matters that are inherently uncertain. We have reviewed these critical accounting estimates and related disclosures with our audit committee.

Revenue Recognition

Our products are fully functional at the time of shipment and do not require production, modification or customization. We recognize revenue from product sales when persuasive evidence of an arrangement exists, delivery has occurred, the fee is fixed or determinable and collection is reasonably assured. Our fee is considered fixed or determinable at the execution of an agreement, based on specific products and quantities to be delivered at specified prices, which is evidenced by a customer purchase order or other persuasive evidence of an arrangement. Our agreements with non-distributor customers do not include rights of return or acceptance provisions. Product revenue is recognized upon shipment of product to customers, net of accruals for estimated sales returns and allowances, which to date, have not been significant.

Approximately 16% of our sales were made through third-party distributors in 2013. Sales to distributors are included in deferred revenue and we include the related costs in inventory until sales and delivery to the end customers occurs. Two distributor arrangements, which together accounted for 11% of our total revenue in 2013, allow for limited price protection and rights of stock rotation on product unsold by the distributors. The price protection rights allow distributors the right to a credit in the event of declines in the price of our product that they hold prior to the sale to a specific end customer. In the event that we reduce the selling price of products held by distributors, deferred revenue related to distributors with price protection rights is reduced upon notification to the customer of the price change. Stock rotation in the two distributor arrangements is limited to returns for exchange only for a small percentage of product (5%-10%) purchased over a limited period of time (during the immediately prior three to nine months). Other than these two arrangements, no other customer arrangements include any rights of return or acceptance provisions. Revenue recognition on product sales through distributors is highly dependent on receiving pertinent and accurate data from our distributors in a timely fashion. Distributors provide us periodic data prior to the release of our consolidated financial statements regarding the product, price, quantity and end customer when products are resold, as well as the quantities of our products they still have in stock.

We monitor collectability of accounts receivable primarily through review of the accounts receivable aging. Our policy is to record an allowance for doubtful accounts based on specific collection issues we have identified, aging of underlying receivables and historical experience of uncollectible balances. As of both December 31, 2013 and 2012, our allowance for doubtful accounts was $152,000.

We have not made any material changes in the accounting methodology we use to record the allowance for doubtful accounts during the past three years. If actual results are not consistent with the assumptions and estimates used, for example, if the financial condition of the customer deteriorated, we may be required to record additional expense that could materially negatively impact our operating results. To date, however, substantially all of our receivables have been collected within the following quarter.

Inventory Valuation

We value our inventory, which includes materials, labor and overhead, at the lower of cost or market. Cost is computed using standard cost, which approximates actual cost, on a first-in, first-out basis. We periodically

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write-down our inventory to the lower of cost or market based on our estimates that consider historical usage and future demand. These factors are impacted by market and economic conditions, technology changes, new product introductions and changes in strategic direction. The calculation of our inventory valuation requires management to make assumptions and to apply judgment regarding forecasted customer demand and technological obsolescence that may turn out to be inaccurate. Inventory valuation reserves were $1,479,000 and $1,720,000 as of December 31, 2013 and 2012, respectively. Inventory valuation reserves, once established, are not reversed until the related inventory has been sold or scrapped.

We have not made any material changes in the accounting methodology we use to record inventory reserves during the past three years. We do not believe there is a reasonable likelihood that there will be a material change in the future estimates or assumptions that we use to calculate our inventory reserve. However, if estimates regarding customer demand are inaccurate or changes in technology affect demand for certain products in an unforeseen manner, we may be exposed to losses or gains that could be material.

Product Warranty

Our products are under warranty against defects in material and workmanship generally for a period of one or two years. We accrue for estimated warranty cost at the time of sale based on anticipated warranty claims and actual historical warranty claims experience including knowledge of specific product failures that are outside of our typical experience. The warranty obligation is determined based on product failure rates, cost of replacement and failure analysis cost. We monitor product returns for warranty-related matters and monitor both a specific and general accrual for the related warranty expense based on specific circumstances and general historical experience. Our warranty obligation requires management to make assumptions regarding failure rates and failure analysis costs. If actual warranty costs differ significantly from these estimates, adjustments may be required in the future, which would adversely affect our gross margins and operating results. The warranty liability as of December 31, 2013 and 2012, were $40,000.

In September 2010, we were informed of a claim related to repair and replacement costs in connection with shipments of over 4,000 integrated circuits made by us during the summer and fall of 2009. We also assessed, provided and accumulated additional warranty reserves based on estimated, probable costs to replace units. In March 2010, we developed additional tests to screen out the wafer die that might be susceptible to a suspected type of failure ultimately related to the lack of a manufacturing process design rule and resumed shipments to the customer. Based on our standard warranty provisions, we provided replacement parts to the customer for the known and suspected failures that had occurred. In 2012, based on additional review investigation and settlement discussions with the customer, we booked an additional warranty cost of $750,000. This amount was recorded as a reduction to revenue. In June 2012, we entered into a settlement agreement with the customer in which we paid $1,750,000 in July 2012.

Goodwill and Purchased Intangible Assets

Goodwill represents the excess of the cost of an acquired entity over the fair value of the acquired net assets. Events or circumstances which could trigger an impairment review include, but are not limited to a significant adverse change in legal factors or in the business climate, an adverse action or assessment by a regulator, unanticipated competition, a loss of key personnel, significant changes in the manner of use of the acquired assets or the strategy for our overall business, significant negative industry or economic trends or significant underperformance relative to expected historical or projected future results of operations.

Goodwill is tested for impairment on an annual basis during the fourth fiscal quarter or more frequently if we believe indicators of impairment exist. The performance of the test involves a two-step process. The first step requires comparing the fair value of the reporting unit to its net book value, including goodwill. Since we only have one reporting unit, the fair value of the reporting unit is determined by taking our market capitalization as determined through quoted market prices and adjusted for control premiums and other relevant factors. A

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potential impairment exists if the fair value of the reporting unit is lower than its net book value. The second step of the process is only performed if a potential impairment exists, and it involves determining the difference between the fair value of the reporting unit’s net assets other than goodwill and the fair value of the reporting unit. If the difference is less than the net book value of goodwill, impairment exists and is recorded. In the event that we determine that the value of goodwill has become impaired, we will record an accounting charge for the amount of impairment during the fiscal quarter in which the determination is made. We have not been required to perform this second step of the process because the fair value of the reporting unit has significantly exceeded its book value at every measurement date.

Stock-Based Compensation

We account for stock-based compensation in accordance with authoritative guidance which requires the measurement and recognition of compensation expense for all share-based payment awards made to employees and directors based on the grant date fair values of the awards. The fair value of stock option awards is estimated using the Black-Scholes option pricing model. The fair value of restricted stock units is based on the fair market value of our common stock on the date of grant. The value of the award that is ultimately expected to vest is recognized as expense over the requisite service periods in our consolidated statements of operations. We elected to treat share-based payment awards with graded vesting schedules and time-based service conditions as a single award and recognize stock-based compensation expense on a straight-line basis (net of estimated forfeitures) over the requisite service period. Stock-based compensation expenses are classified in the statement of operations based on the department to which the related employee reports.

We account for stock options issued to non-employees in accordance with the guidance for equity-based payments to non-employees. Stock option awards to non-employees are accounted for at fair value using the Black-Scholes option pricing model. Our management believes that the fair value of stock options is more reliably measured than the fair value of the services received. The fair value of the unvested portion of the options granted to non-employees is re-measured each period. The resulting increase in value, if any, is recognized as expense during the period the related services are rendered.

The Black-Scholes option pricing model requires management to make assumptions and to apply judgment in determining the fair value of our awards. The most significant assumptions and judgments include estimating the fair value of underlying stock, expected volatility and expected term. In addition, the recognition of stock-based compensation expense is impacted by estimated forfeiture rates.

We estimated the expected volatility from the historical volatilities of several unrelated public companies within the semiconductor industry because our common stock has limited trading history. When selecting the public companies used in the volatility calculation, we selected companies in the semiconductor industry with comparable characteristics to us, including stage of development, lines of business, market capitalization, revenue and financial leverage. The weighted average expected life of options was calculated using the simplified method. This decision was based on the lack of relevant historical data due to our limited experience and the lack of active market for our common stock. The risk-free interest rate is based on the U.S. Treasury yields in effect at the time of grant for periods corresponding to the expected term of the options. The expected dividend rate is zero based on the fact that we have not historically paid dividends and have no intention to pay cash dividends in the foreseeable future. The forfeiture rate is established based on the historical average period of time that options were outstanding and adjusted for expected changes in future exercise patterns.

We do not believe there is a reasonable likelihood that there will be material changes in the estimates and assumptions we use to determine stock-based compensation expense. In the future, if we determine that other option valuation models are more reasonable, the stock-based compensation expense that we record in the future may differ significantly from what we have recorded using the Black-Scholes option pricing model.

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Income Taxes

Deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities, and are measured using the enacted tax rates and laws that will be in effect when and where the differences are expected to reverse. We record a valuation allowance to reduce deferred tax assets to the amount that we believe is more likely than not to be realized. In assessing the need for a valuation allowance, we consider all positive and negative evidence, including scheduled reversals of deferred tax liabilities, historical levels of income, projections of future income, expectations and risk associated with estimates of future taxable income and ongoing prudent and practical tax planning strategies. To the extent that we believe it is more likely than not that some portion of our deferred tax assets will not be realized, we would increase the valuation allowance against deferred tax assets. The determination of recording or releasing a tax valuation allowance is made, in part, pursuant to an assessment performed by management regarding the likelihood that we will generate sufficient future taxable income against which the benefits of our deferred tax assets may or may not be realized. This assessment requires management to exercise significant judgment and make estimates with respect to our ability to generate revenue, gross profits, operating income and taxable income in future periods. Among other factors, management must make assumptions regarding current and projected overall business and semiconductor industry conditions, operating efficiencies, our ability to timely develop, introduce and consistently manufacture new products to meet our customers’ needs and specifications, our ability to adapt to technological changes and the competitive environment, which may impact our ability to generate taxable income and, in turn, realize the value of our deferred tax assets. Although, we believe that the judgment we used is reasonable, actual results can differ due to a change in market conditions, changes in tax laws and other factors.

We have valuation allowance against deferred tax assets for the years ended December 31, 2013 and 2012. The decision to establish the valuation allowance in 2012 was due to negative evidence that includes our cumulative losses in U.S., Singapore and Taiwan after considering permanent tax differences and the passage of new California tax law requiring use of single sales factor which will reduce the amount of California taxable income starting 2013.

In accordance with FASBs guidance on Accounting for Uncertainty in Income Taxes, we perform a comprehensive review of uncertain tax positions regularly. The guidance prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken, or expected to be taken, in a tax return. We determine the tax liability for uncertain tax positions based on a two-step process. The first step is to determine whether it is more likely than not based on technical merits that each income tax position would be sustained upon examination. The second step is to measure the tax benefit as the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement with a tax authority that has full knowledge of all relevant information. The assessment of each tax position requires significant judgment and estimates. We believe our tax return positions are fully supported, but tax authorities could challenge certain positions, which may not be fully sustained. All tax positions are periodically analyzed and adjusted as a result of events, such as the resolution of tax audits, issuance of new regulations or new case law, negotiations with tax authorities, and expiration of statutes of limitations.

Results of Operations and Key Operating Metrics

The following describes the line items in the statements of operations, which we consider to be our key operating metrics.

Revenue. We generate revenue from sales of our semiconductor products to end customers. A portion of our products is sold indirectly to customers through distributors.

We design and develop high-speed analog semiconductor solutions for the communications and computing markets. Our revenue is driven by various trends in these markets. These trends include the deployment and broader market adoption of next generation 100G technologies in communications and enterprise networks, the

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timing of next generation network and enterprise server upgrades in different geographic locations worldwide, the introduction and broader market adoption of next generation server platforms such as Intel’s Haswell-based platform, and the deployment of high-speed memory interfaces in server and computing platforms.

Our revenue is also impacted by changes in the number and average selling prices of our semiconductor products. Our products are typically characterized by a life cycle that begins with higher average selling prices and lower volumes, followed by broader market adoption, higher volumes, and average selling prices that are lower than initial levels.

We operate in industries characterized by rapidly changing technologies and industry standards as well as technological obsolescence. Our revenue growth is dependent on our ability to continually develop and introduce new products to meet the changing technology and performance requirements of our customers, diversify our revenue base and generate new revenue to replace, or build upon, the success of previously introduced products which may be rapidly maturing. As a result, our revenue is impacted to a more significant extent by product life cycles for a variety of products and to a much lesser extent, if any, by any single product. In 2009, we successfully introduced and began to ship a new product in production which integrated a new PLL, along with a new register buffer. Sales of this newly introduced part comprised 18% of our total revenue in 2010, respectively. In 2010, this product matured. As a result, sales of this product in 2010 declined in volume. In 2010, we also began to ship in production volume a new “low voltage” version of our integrated PLL and register buffer, which is shipping in the form of product number INSSTE32882LV-GS02, or the GS02 product. Sales of the GS02 product comprised 38% and 32% of our total revenue in 2011 and 2010, respectively. In 2011, we began to ship in production volume a new “ultra-low voltage” version of our integrated PLL and register buffer, which is shipping in the form of product number INSSTE32882UV-GS02, or the GS02UV product. Sales of the GS02UV product comprised 39%, 45% and 13% of our total revenue in 2013, 2012 and 2011, respectively. In 2010, we introduced and began to ship in commercial volume a dual, differential linear TIA, which we identify as product number 2850TA-SO1D. Sales of 2850TA-SO1D product comprised 10% and 14% of our total revenue in 2013 and 2012, respectively. In 2014, we expect that revenue from sales of GS02UV and our new lowest power integrated phase lock loop and register buffer, which is shipping in the form of product number INSSTE32882XV will be significant.

The following table is based on the geographic location to which our product is initially shipped. In most cases this will differ from the ultimate location of the end user of a product containing our technology. For sales to our distributors, their geographic location may be different from the geographic locations of the ultimate end customer. Sales by geography for the periods indicated were:

Cost of revenue. Cost of revenue includes cost of materials such as wafers processed by third-party foundries, costs associated with packaging and assembly, test and shipping, cost of personnel, including stock-based compensation, as well as equipment associated with manufacturing support, logistics and quality assurance, warranty costs, write down of inventories, amortization of production mask costs, overhead and other indirect costs, such as allocated occupancy and information technology, or IT, costs.

As some semiconductor products mature and unit volumes increase, their average selling prices may decline. These declines are often paired with improvements in manufacturing yields and lower wafer, assembly

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and test costs, which offset some of the margin reduction that results from lower prices. However, our gross profit, period over period, may fluctuate as a result of changes in average selling prices due to new product introductions or existing product transitions into larger scale commercial volumes, manufacturing costs as well as our product mix.

Research and development. Research and development expense includes personnel-related expenses, including salaries, stock-based compensation and employee benefits. It also includes pre-production engineering mask costs, software license expenses, prototype wafer, packaging and test costs, design and development costs, testing and evaluation costs, depreciation expense and other indirect costs. All research and development costs are expensed as incurred. Reimbursements from customers related to research and development contracts are offset against research and development costs. We expect research and development expense to increase in absolute dollars as we continue to invest resources to develop more products and enhance our existing product portfolio.

Sales and marketing. Sales and marketing expense consists primarily of salaries, stock-based compensation, employee benefits, travel, promotions, trade shows, marketing and customer support, commission payments to employees, depreciation expense and other indirect costs. We expect sales and marketing expense to increase in absolute dollars to support the growth of our business and promote our products to current and potential customers.

General and administrative. General and administrative expense consists primarily of salaries, stock-based compensation, employee benefits and expenses for executive management, legal, finance and human resources. In addition, general and administrative expenses include fees for professional services and other indirect costs. We expect general and administrative expense to increase in absolute dollars due to the general growth of our business and the costs associated with becoming a public company for, among other things, SEC reporting and compliance, director fees, insurance, transfer agent fees and similar expenses.

Provision (benefit) for income taxes. For the year ended December 31, 2011, we recorded a net tax benefit of $1.2 million, which reflects an effective tax rate benefit of 171%. The effective tax rate benefit of 171% differs from the statutory rate of 35% primarily due to prior year provision true-up for a worldwide combined filing basis taken on the California tax return and, foreign income taxes provided at lower rates, geographic mix in profitability, recognition of federal research and development credits and unrecognized tax benefits. For the year ended December 31, 2012, we recorded provision for income taxes of $13.7 million, which reflects an effective tax rate of 195%. The effective tax rate of 195% differs from the statutory rate of 35% primarily due to the full valuation allowance established against net deferred tax assets and, to a lesser extent, foreign income taxes provided at lower rates, geographic mix in profitability, recognition of research and development credits and unrecognized tax benefits. For the year ended December 31, 2013, we recorded provision for income taxes of $1.8 million, which reflects an effective tax rate of 15%. The effective tax rate of 15% differs from the statutory rate of 34% primarily due to the an increase in valuation allowance, foreign income taxes provided at lower rates, geographic mix in profitability, unrecognized tax benefits and recognition of research and development credits.

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The following table sets forth a summary of our statement of operations for the periods indicated:

The following table sets forth a summary of our statement of operations as a percentage of each line item to the revenue:

Comparison of the Years Ended December 31, 2013, 2012 and 2011

Revenue

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Total revenue for the year ended December 31, 2013 increased by $11.5 million due to year over year increase in number of units sold and average selling price of 7% and 4%, respectively. The increase in number of units sold was due to sale of high speed memory interface products, dual, differential linear TIA, iPHY 100Gbe CMOS gearbox products and iMB™. The increase in average selling price of 4% was due to product mix. In addition, revenue increased by $0.8 million due to provision for estimated settlement of a warranty claim with a customer that was several years old, which was recorded as a reduction in revenue for the year ended December 31, 2012.

Total revenue for the year ended December 31, 2012 increased by $11.9 million due to year over year increase in average selling price of 39%, partially offset by a decrease in the number of units sold of 16%. The increase in average selling price and decrease in number of units sold was due to discontinuance of legacy products supported by our Taiwan subsidiary in 2011 which sells at much lower price. The revenue of our Taiwan subsidiary for the year ended December 31, 2011 was $1.3 million. For the year ended December 31, 2012, the average selling price and number of units sold, excluding our Taiwan subsidiary increased by 4% and 13%, respectively. The increase in number of units sold was mainly due to increase in demand of our high speed memory interface products, TIA and iMB™. The increase in revenue for the year ended December 31, 2012 was partially offset by the settlement of a warranty claim with a customer that was several years old for $0.8 million.

Cost of Revenue and Gross Profit

Cost of revenue and gross profit for the year ended December 31, 2013 increased by $4.4 million and $7.0 million, respectively, compared to the prior year primarily due to increase in the number of units purchased by customers from our high speed memory interface products, TIA, iPHY 100Gbe CMOS gearbox products and iMB™, consistent with the overall increase in revenue. Product costs as a percentage of revenue were relatively unchanged compared to the prior year.

Cost of revenue and gross profit for the year ended December 31, 2012 increased by $4.0 million and $7.9 million, respectively, compared to the prior year primarily due to increase in the number of units purchased by customers from our high speed memory interface products, TIA and iMB™, consistent with the overall increase in revenue. Product costs as a percentage of revenue were relatively unchanged compared to the prior year.

Research and Development

Research and development expense for the year ended December 31, 2013 increased by $10.4 million due to the increase in research and development headcount, which resulted in a $7.5 million increase in personnel costs and stock-based compensation expense and $1.5 million increase in CAD software tool license expense. In addition, total reimbursement from customers related to research and development contracts was lower by $1.5 million due to expiration of a contract in 2012. The increases were partially offset by decrease in consulting expenses by $1.6 million due to hiring of engineers. The increase in research and development expense was primarily driven by our strategy to continue to expand our product offerings and enhance our existing products.

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Research and development expense for the year ended December 31, 2012 increased by $11.5 million due to the increase in research and development headcount, which resulted in a $6.6 million increase in personnel costs and stock-based compensation expense, a $1.5 million increase in consulting fees, a $2.0 million increase in packaging development, test and pre-production engineering mask costs and a $0.8 million increase in CAD software tool license expense. The increase in research and development expense was primarily driven by our strategy to continue to expand our product offerings and enhance our existing products.

Sales and Marketing